$ git clone -n https://src.fedoraproject.org/rpms/alsa-lib.git /var/lib/mock/f39-build-2340294-59700/root/chroot_tmpdir/scmroot/alsa-lib
Cloning into '/var/lib/mock/f39-build-2340294-59700/root/chroot_tmpdir/scmroot/alsa-lib'...
$ git fetch origin 5033476669317c84c320f56b6d62d190b5af8a9a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/alsa-lib
 * [new ref]         5033476669317c84c320f56b6d62d190b5af8a9a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5033476 update to 1.2.11