echo >&2 "Warning: $orig_head commit."
git-update-index --refresh 2>/dev/null
git-read-tree -u -m "$orig_head" "$curr_head" ||
echo >&2 "Warning: $orig_head commit."
git-update-index --refresh 2>/dev/null
git-read-tree -u -m "$orig_head" "$curr_head" ||