$ git clone -n https://src.fedoraproject.org/rpms/community-mysql.git /var/lib/mock/f40-build-2429805-60606/root/chroot_tmpdir/scmroot/community-mysql
Cloning into '/var/lib/mock/f40-build-2429805-60606/root/chroot_tmpdir/scmroot/community-mysql'...
$ git fetch origin b0a2e56f8ec17129bb6989a02bd47b6c31afc3c0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/community-mysql
 * [new ref]         b0a2e56f8ec17129bb6989a02bd47b6c31afc3c0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b0a2e56 Replaced by mysql8.0 package