$ git clone -n https://src.fedoraproject.org/rpms/plasma-systemsettings.git /var/lib/mock/f42-bootstrap-3533974-46428/root/chroot_tmpdir/scmroot/plasma-systemsettings
Cloning into '/var/lib/mock/f42-bootstrap-3533974-46428/root/chroot_tmpdir/scmroot/plasma-systemsettings'...
$ git fetch origin 1081021ffea628767ef72bcc424753a46fa65504:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-systemsettings
 * [new ref]         1081021ffea628767ef72bcc424753a46fa65504 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1081021 6.3.5