$ git clone -n https://src.fedoraproject.org/rpms/perl-MetaCPAN-Client.git /var/lib/mock/f45-build-24762-606/root/chroot_tmpdir/scmroot/perl-MetaCPAN-Client
Cloning into '/var/lib/mock/f45-build-24762-606/root/chroot_tmpdir/scmroot/perl-MetaCPAN-Client'...
$ git fetch origin 6a78488a921253f36db4491ab2e2adcd16a81f82:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-MetaCPAN-Client
 * [new ref]         6a78488a921253f36db4491ab2e2adcd16a81f82 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6a78488 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild