[SOLVED] Is there a git command that makes the working tree equal to the index without changing any refs?

Is there a git command that makes the working tree equal to the index without changing any refs?

Suppose I use git read-tree <sha> without -um (because I do not want a merge but rather a simple read).

Now I want to make do the equivalent of the last step of git reset --hard (make the working tree equal to the index) without changing any refs.

Is there a mechanism in git to do this?

Equivalently, is there a way to semantically do a git read-tree -u without any kind of merge, instead simply overwriting the index and working tree with the contents of the given tree-ish?

I tried git checkout-index -a -f, but it does not remove files in the working directory, only adds them.

Solution

I think that is what git restore -- . does (set working tree just like the index). Now, your last comment makes me think you are looking for git restore --worktree --staged --source <some-commit-id> -- . which will adjust index and working tree to look just like the commit id you provide.