$ git clone -n https://src.fedoraproject.org/rpms/kf6-kwindowsystem.git /var/lib/mock/f40-build-2405309-60558/root/chroot_tmpdir/scmroot/kf6-kwindowsystem
Cloning into '/var/lib/mock/f40-build-2405309-60558/root/chroot_tmpdir/scmroot/kf6-kwindowsystem'...
$ git fetch origin 79d1ff1083e57eb948cd9a0e2555e19e5fb2af7c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kwindowsystem
 * [new ref]         79d1ff1083e57eb948cd9a0e2555e19e5fb2af7c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 79d1ff1 5.249.0