$ git clone -n https://src.fedoraproject.org/rpms/ocaml-benchmark.git /var/lib/mock/f45-build-20461-570/root/chroot_tmpdir/scmroot/ocaml-benchmark
Cloning into '/var/lib/mock/f45-build-20461-570/root/chroot_tmpdir/scmroot/ocaml-benchmark'...
$ git fetch origin 62708b858598ea0e7717f1f0d092079fa040629d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-benchmark
 * [new ref]         62708b858598ea0e7717f1f0d092079fa040629d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 62708b8 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild