Without this patch, the code would look for the submodule
commits in the superproject and (needlessly) fail when it
couldn't find them.
Signed-off-by: Sven Verdoolaege <skimo@liacs.nl> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>