git fetch并结帐FETCH_HEAD后会做什么? [英] What does git fetch followed by checkout FETCH_HEAD do?

问题描述

以下命令做什么:

git fetch <remote> <branch> && git checkout FETCH_HEAD

我只有一个本地分支(master)，并且执行上述命令.我应该对本地存储库进行哪些更改，以及如何验证(查看)它们?

I have only one local branch (master) and I execute the above command. What changes to my local repository should I expect and how can I verify (see) them?

推荐答案

您可能知道命令的第一部分将执行的操作. git fetch <remote> <some_branch>将更新您指定的分支的本地跟踪分支.但这不会更改计算机上实际的本地对应some_branch.

You are probably aware of what the first part of your command will do. git fetch <remote> <some_branch> will update the local tracking branch of the branch you specify. But this will not alter the actual local corresponding some_branch on your machine.

当您执行git fetch时，Git有一个称为FETCH_HEAD的特殊引用，该引用指向刚刚获取的分支.在这种情况下，它将指向remote/some_branch，因为这是刚刚获取的分支.通过做

When you do a git fetch, Git has a special ref called FETCH_HEAD which points to the branch which was just fetched. In this case, it would point to remote/some_branch, since this is the branch which was just fetched. By doing

git checkout FETCH_HEAD

您将在分离的HEAD状态下签出origin/some_branch.这可能不是您想要的，但是无论如何，您的复合命令实际上不会更新本地some_branch.为此，您需要执行一个额外的git merge步骤，或者仅从some_branch中执行一个git pull.

you would be checking out origin/some_branch in a detached HEAD state. This may or not may not be what you intend, but in any case, your compound command would not actually update the local some_branch. To do that, you would need an additional git merge step, or to just do a git pull from some_branch.

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