$ git clone -n https://src.fedoraproject.org/rpms/kf6-modemmanager-qt.git /var/lib/mock/f41-build-860888-169221/root/chroot_tmpdir/scmroot/kf6-modemmanager-qt
Cloning into '/var/lib/mock/f41-build-860888-169221/root/chroot_tmpdir/scmroot/kf6-modemmanager-qt'...
$ git fetch origin db8644bb57aaa75d4646b819b05d10809fffb17c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-modemmanager-qt
 * [new ref]         db8644bb57aaa75d4646b819b05d10809fffb17c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at db8644b 6.8.0