$ git clone -n https://src.fedoraproject.org/rpms/qcoro.git /var/lib/mock/f40-build-2121701-50739/root/chroot_tmpdir/scmroot/qcoro
Cloning into '/var/lib/mock/f40-build-2121701-50739/root/chroot_tmpdir/scmroot/qcoro'...
$ git fetch origin b1cbcc91e1437e071868c979d63e17eb5c3dfacd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qcoro
 * [new ref]         b1cbcc91e1437e071868c979d63e17eb5c3dfacd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b1cbcc9 0.10.0