$ git clone -n https://src.fedoraproject.org/rpms/kf6-modemmanager-qt.git /var/lib/mock/f42-build-side-1-3501701-45976/root/chroot_tmpdir/scmroot/kf6-modemmanager-qt
Cloning into '/var/lib/mock/f42-build-side-1-3501701-45976/root/chroot_tmpdir/scmroot/kf6-modemmanager-qt'...
$ git fetch origin 8e84741a3b7e1275a06af604b9729330fe824496:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-modemmanager-qt
 * [new ref]         8e84741a3b7e1275a06af604b9729330fe824496 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8e84741 6.13.0