$ git clone -n https://src.fedoraproject.org/rpms/qt6-qtserialbus.git /var/lib/mock/f40-build-2107284-50596/root/chroot_tmpdir/scmroot/qt6-qtserialbus
Cloning into '/var/lib/mock/f40-build-2107284-50596/root/chroot_tmpdir/scmroot/qt6-qtserialbus'...
$ git fetch origin b739ac0cf6455963fb801fd730abbe59d24d9855:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt6-qtserialbus
 * [new ref]         b739ac0cf6455963fb801fd730abbe59d24d9855 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b739ac0 6.6.1