$ git clone -n https://src.fedoraproject.org/rpms/plasma-systemsettings.git /var/lib/mock/f40-build-788675-135301/root/chroot_tmpdir/scmroot/plasma-systemsettings
Cloning into '/var/lib/mock/f40-build-788675-135301/root/chroot_tmpdir/scmroot/plasma-systemsettings'...
$ git fetch origin 681563842b93fbd3160ec3638307d1c4fe08921a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-systemsettings
 * [new ref]         681563842b93fbd3160ec3638307d1c4fe08921a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6815638 6.0.0