Git获取对象，没有引用

Question

我想从远程仓库中获取对象，但不更新任何本地引用。 （是的，我知道这是一个相当不寻常的案例。）

我看到我可以将refspec传递给git fetch，但是当我传递一个空的（git fetch my-remote ''）时，它似乎默认为其他东西，因为我收到以下错误：

fatal: Couldn't find remote ref HEAD
fatal: The remote end hung up unexpectedly

有没有办法指定“null”ref-spec？

Answer 1

To not update any ref you leave part after : in refspec empty:

git fetch origin master:

Then find the commit hash in .git/FETCH_HEAD

Answer to your comment: no, git fetches only objects necessary to get the specified remote ref. The pattern of getting only one branch is commonly used, there is even a dedicated option for git clone for this.

PS: I would instead fetch to a temporary branch with some random name.