$ git clone -n https://src.fedoraproject.org/rpms/alsa-lib.git /var/lib/mock/f40-build-2195016-51511/root/chroot_tmpdir/scmroot/alsa-lib
Cloning into '/var/lib/mock/f40-build-2195016-51511/root/chroot_tmpdir/scmroot/alsa-lib'...
$ git fetch origin 313e6bd3442251c75a92604db2e6cf8cad193db2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/alsa-lib
 * [new ref]         313e6bd3442251c75a92604db2e6cf8cad193db2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 313e6bd fix SplitPCM (alsa-ucm)