$ git clone -n https://src.fedoraproject.org/rpms/qm.git /var/lib/mock/f39-build-2315531-57765/root/chroot_tmpdir/scmroot/qm
Cloning into '/var/lib/mock/f39-build-2315531-57765/root/chroot_tmpdir/scmroot/qm'...
$ git fetch origin 0b2870f43e840bc50d499b3afd8b5a583a12ddfd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qm
 * [new ref]         0b2870f43e840bc50d499b3afd8b5a583a12ddfd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0b2870f Update to version v0.6.2