$ git clone -n https://src.fedoraproject.org/rpms/plexus-containers.git /var/lib/mock/f40-build-2127609-50785/root/chroot_tmpdir/scmroot/plexus-containers
Cloning into '/var/lib/mock/f40-build-2127609-50785/root/chroot_tmpdir/scmroot/plexus-containers'...
$ git fetch origin 965772d9bb9cea597d6fb20aee14fd38ec16ce2b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plexus-containers
 * [new ref]         965772d9bb9cea597d6fb20aee14fd38ec16ce2b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 965772d Get rid of module_prefix macro