$ git clone -n https://src.fedoraproject.org/rpms/plasma-firewall.git /var/lib/mock/f40-build-1495528-23854/root/chroot_tmpdir/scmroot/plasma-firewall
Cloning into '/var/lib/mock/f40-build-1495528-23854/root/chroot_tmpdir/scmroot/plasma-firewall'...
$ git fetch origin ad5ec04f61db4bdf8da67ab380f4bb2837c5d8e2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-firewall
 * [new ref]         ad5ec04f61db4bdf8da67ab380f4bb2837c5d8e2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ad5ec04 6.1.2