Git fetch 命令

更新时间: 2019-07-13 17:17

git-fetch - Download objects and refs from another repository

语法

git fetch [<options>] [<repository> [<refspec>...]]
git fetch [<options>] <group>
git fetch --multiple [<options>] [(<repository> | <group>)...]
git fetch --all [<options>]

参数

--all
    Fetch all remotes.

-a, --append
    Append ref names and object names of fetched refs to the existing contents of .git/FETCH_HEAD. Without this option old data in
    .git/FETCH_HEAD will be overwritten.

--depth=<depth>
    Limit fetching to the specified number of commits from the tip of each remote branch history. If fetching to a shallow repository
    created by git clone with --depth=<depth> option (see git-clone(1)), deepen or shorten the history to the specified number of
    commits. Tags for the deepened commits are not fetched.

--deepen=<depth>
    Similar to --depth, except it specifies the number of commits from the current shallow boundary instead of from the tip of each
    remote branch history.

--shallow-since=<date>
    Deepen or shorten the history of a shallow repository to include all reachable commits after <date>.

--shallow-exclude=<revision>
    Deepen or shorten the history of a shallow repository to exclude commits reachable from a specified remote branch or tag. This
    option can be specified multiple times.

--unshallow
    If the source repository is complete, convert a shallow repository to a complete one, removing all the limitations imposed by
    shallow repositories.

    If the source repository is shallow, fetch as much as possible so that the current repository has the same history as the source
    repository.

--update-shallow
    By default when fetching from a shallow repository, git fetch refuses refs that require updating .git/shallow. This option updates
    .git/shallow and accept such refs.

--dry-run
    Show what would be done, without making any changes.

-f, --force
    When git fetch is used with <rbranch>:<lbranch> refspec, it refuses to update the local branch <lbranch> unless the remote branch
    <rbranch> it fetches is a descendant of <lbranch>. This option overrides that check.

-k, --keep
    Keep downloaded pack.

--multiple
    Allow several <repository> and <group> arguments to be specified. No <refspec>s may be specified.

-p, --prune
    Before fetching, remove any remote-tracking references that no longer exist on the remote. Tags are not subject to pruning if they
    are fetched only because of the default tag auto-following or due to a --tags option. However, if tags are fetched due to an
    explicit refspec (either on the command line or in the remote configuration, for example if the remote was cloned with the --mirror
    option), then they are also subject to pruning.

-n, --no-tags
    By default, tags that point at objects that are downloaded from the remote repository are fetched and stored locally. This option
    disables this automatic tag following. The default behavior for a remote may be specified with the remote.<name>.tagOpt setting.
    See git-config(1).

--refmap=<refspec>
    When fetching refs listed on the command line, use the specified refspec (can be given more than once) to map the refs to
    remote-tracking branches, instead of the values of remote.*.fetch configuration variables for the remote repository. See section on
    "Configured Remote-tracking Branches" for details.

-t, --tags
    Fetch all tags from the remote (i.e., fetch remote tags refs/tags/* into local tags with the same name), in addition to whatever
    else would otherwise be fetched. Using this option alone does not subject tags to pruning, even if --prune is used (though tags may
    be pruned anyway if they are also the destination of an explicit refspec; see --prune).

--recurse-submodules[=yes|on-demand|no]
    This option controls if and under what conditions new commits of populated submodules should be fetched too. It can be used as a
    boolean option to completely disable recursion when set to no or to unconditionally recurse into all populated submodules when set
    to yes, which is the default when this option is used without any value. Use on-demand to only recurse into a populated submodule
    when the superproject retrieves a commit that updates the submodule's reference to a commit that isn't already in the local
    submodule clone.

-j, --jobs=<n>
    Number of parallel children to be used for fetching submodules. Each will fetch from different submodules, such that fetching many
    submodules will be faster. By default submodules will be fetched one at a time.

--no-recurse-submodules
    Disable recursive fetching of submodules (this has the same effect as using the --recurse-submodules=no option).

--submodule-prefix=<path>
    Prepend <path> to paths printed in informative messages such as "Fetching submodule foo". This option is used internally when
    recursing over submodules.

--recurse-submodules-default=[yes|on-demand]
    This option is used internally to temporarily provide a non-negative default value for the --recurse-submodules option. All other
    methods of configuring fetch's submodule recursion (such as settings in gitmodules(5) and git-config(1)) override this option, as
    does specifying --[no-]recurse-submodules directly.

-u, --update-head-ok
    By default git fetch refuses to update the head which corresponds to the current branch. This flag disables the check. This is
    purely for the internal use for git pull to communicate with git fetch, and unless you are implementing your own Porcelain you are
    not supposed to use it.

--upload-pack <upload-pack>
    When given, and the repository to fetch from is handled by git fetch-pack, --exec=<upload-pack> is passed to the command to specify
    non-default path for the command run on the other end.

-q, --quiet
    Pass --quiet to git-fetch-pack and silence any other internally used git commands. Progress is not reported to the standard error
    stream.

-v, --verbose
    Be verbose.

--progress
    Progress status is reported on the standard error stream by default when it is attached to a terminal, unless -q is specified. This
    flag forces progress status even if the standard error stream is not directed to a terminal.

-4, --ipv4
    Use IPv4 addresses only, ignoring IPv6 addresses.

-6, --ipv6
    Use IPv6 addresses only, ignoring IPv4 addresses.

<repository>
    The "remote" repository that is the source of a fetch or pull operation. This parameter can be either a URL (see the section GIT
    URLS below) or the name of a remote (see the section REMOTES below).

<group>
    A name referring to a list of repositories as the value of remotes.<group> in the configuration file. (See git-config(1)).

<refspec>
    Specifies which refs to fetch and which local refs to update. When no <refspec>s appear on the command line, the refs to fetch are
    read from remote.<repository>.fetch variables instead (see CONFIGURED REMOTE-TRACKING BRANCHES below).

    The format of a <refspec> parameter is an optional plus +, followed by the source <src>, followed by a colon :, followed by the
    destination ref <dst>. The colon can be omitted when <dst> is empty. <src> is typically a ref, but it can also be a fully spelled
    hex object name.

    tag <tag> means the same as refs/tags/<tag>:refs/tags/<tag>; it requests fetching everything up to the given tag.

    The remote ref that matches <src> is fetched, and if <dst> is not empty string, the local ref that matches it is fast-forwarded
    using <src>. If the optional plus + is used, the local ref is updated even if it does not result in a fast-forward update.

        Note
        When the remote branch you want to fetch is known to be rewound and rebased regularly, it is expected that its new tip will not
        be descendant of its previous tip (as stored in your remote-tracking branch the last time you fetched). You would want to use
        the + sign to indicate non-fast-forward updates will be needed for such branches. There is no way to determine or declare that
        a branch will be made available in a repository with this behavior; the pulling user simply must know this is the expected
        usage pattern for a branch.

使用示例

# 下载远程仓库的所有变动
$ git fetch [remote]

查看更多 git fetch 命令的使用方法,可以使用命令:

git help fetch
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