$ git clone -n https://src.fedoraproject.org/rpms/kf6-modemmanager-qt.git /var/lib/mock/f40-build-787709-134881/root/chroot_tmpdir/scmroot/kf6-modemmanager-qt
Cloning into '/var/lib/mock/f40-build-787709-134881/root/chroot_tmpdir/scmroot/kf6-modemmanager-qt'...
$ git fetch origin 00aacb0199008e78691cfb48f4875afb888caf64:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-modemmanager-qt
 * [new ref]         00aacb0199008e78691cfb48f4875afb888caf64 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 00aacb0 6.0.0