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Re: Regression `git checkout $rev -b branch` while in a `--no-checkout` clone does not check out files

On Thu, Jan 3, 2019 at 12:26 PM Junio C Hamano <gitster@xxxxxxxxx> wrote:
> A "fix" to Ben's optimization for this particular case should be
> fairly straight-forward.  I think we have a special case in the
> checkout codepath for an initial checkout and disable "carry forward
> the fact that the user wanted all the paths removed", so it would be
> the matter of adding yet another condition (is_cache_unborn(), which
> is used to set topts.initial_checkout) to the large collection of
> conditions in skip_merge_working_tree().

I think it might be simpler than that even -- the optimization treats
the following as equivalent when the current checked out revision is
deadbeef (even if the index / worktree differ), when before they were

- git checkout -b newbranch
- git checkout deadbeef -b newbranch

If a revision is specified on the commandline it should be checked out.