$ git clone -n https://src.fedoraproject.org/rpms/plasma-firewall.git /var/lib/mock/f40-build-2531748-61830/root/chroot_tmpdir/scmroot/plasma-firewall
Cloning into '/var/lib/mock/f40-build-2531748-61830/root/chroot_tmpdir/scmroot/plasma-firewall'...
$ git fetch origin d19cb910cd7f9fdde92b889dc853c98da2e69814:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-firewall
 * [new ref]         d19cb910cd7f9fdde92b889dc853c98da2e69814 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d19cb91 6.0.1