$ git clone -n https://src.fedoraproject.org/rpms/plasma-firewall.git /var/lib/mock/f42-build-862336-170742/root/chroot_tmpdir/scmroot/plasma-firewall
Cloning into '/var/lib/mock/f42-build-862336-170742/root/chroot_tmpdir/scmroot/plasma-firewall'...
$ git fetch origin dad21e239a381187718051cc4965859ec3b08e4b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-firewall
 * [new ref]         dad21e239a381187718051cc4965859ec3b08e4b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dad21e2 6.2.4