$ git clone -n https://src.fedoraproject.org/rpms/kf6-kwindowsystem.git /var/lib/mock/f41-build-837710-159364/root/chroot_tmpdir/scmroot/kf6-kwindowsystem
Cloning into '/var/lib/mock/f41-build-837710-159364/root/chroot_tmpdir/scmroot/kf6-kwindowsystem'...
$ git fetch origin 4a095c19909602f8abd49a780e258a1c458ef1db:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kwindowsystem
 * [new ref]         4a095c19909602f8abd49a780e258a1c458ef1db -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4a095c1 6.5.0