Re: [PATCH 5/5] doc: git-checkout: clarify restoring files section

[Junio C Hamano <gitster@pobox.com>]

"Julia Evans" <julia@jvns.ca> writes:

> $ git checkout HEAD:Documentation/ git-commit.adoc
>
> to restore `file.txt` into a different directory than it was originally.

It probably is handy when you want to cross a rename boundary to
backport a new thing into an old history (or vice versa).  Something
like

    $ git checkout v1.0.0
    $ git checkout v1.7.1:builtin cat-file.c

perhaps.

> What I would tell a friend is
> "<tree-ish> 99% of the time just means "commit or something
> which resolves to a commit, but Git has made it more general for
> a reason I don't understand", but of course that's not the right
> thing to say in the Git documentation :)

You are describing commit-ish (which allows an annotated or signed
tag that points at a commit).