stash: allow running from a subdirectory
stash: allow running from a subdirectory

Signed-off-by: James Bowes <366c30c9a12672a1ada45eb161d9344bb0512b1b@dangerouslyinc.com>
Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

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