$ git clone -n https://src.fedoraproject.org/rpms/perl-Parallel-Runner.git /var/lib/mock/f45-build-25653-612/root/chroot_tmpdir/scmroot/perl-Parallel-Runner
Cloning into '/var/lib/mock/f45-build-25653-612/root/chroot_tmpdir/scmroot/perl-Parallel-Runner'...
$ git fetch origin 6c193662a425e62d7a8ac16b07923b77ebe6f1f7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Parallel-Runner
 * [new ref]         6c193662a425e62d7a8ac16b07923b77ebe6f1f7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6c19366 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild