auto-build: naming of build branches fixed for non-heads

	cd "$dir"

	(

		unset GIT_DIR

		remote_ref="${ref/heads/remotes/origin}"

		git fetch origin

		git checkout -B "${ref/heads\//}" "${ref/heads/remotes/origin}"

		git fetch origin --tags

		case "${ref%%/*}" in

			heads)

				git checkout -B "${ref/heads\//}" "$remote_ref"

				;;

			*)

				git checkout -B build/ref/"$ref" "$remote_ref"

				;;

		esac

		git clean -f -d -q -x

		git reset --hard

	)