git-commit: "read-tree -m HEAD" is not the right way to read-tree quickly
git-commit: "read-tree -m HEAD" is not the right way to read-tree quickly

It still looks at the working tree and checks for locally
modified paths.  When are preparing a temporary index from HEAD,
we do not want any of that.

Signed-off-by: Junio C Hamano <dc50d1021234060e53ec42a77d526afa2fe07479@cox.net>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git