$ git clone -n https://src.fedoraproject.org/rpms/plasma-firewall.git /var/lib/mock/f41-build-824387-154063/root/chroot_tmpdir/scmroot/plasma-firewall
Cloning into '/var/lib/mock/f41-build-824387-154063/root/chroot_tmpdir/scmroot/plasma-firewall'...
$ git fetch origin 91bc8d574e9cd872b1d406fcbb2ba4308f73cbf9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-firewall
 * [new ref]         91bc8d574e9cd872b1d406fcbb2ba4308f73cbf9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 91bc8d5 rebuild