$ git clone -n https://src.fedoraproject.org/rpms/ocaml-bin-prot.git /var/lib/mock/f45-build-20463-570/root/chroot_tmpdir/scmroot/ocaml-bin-prot
Cloning into '/var/lib/mock/f45-build-20463-570/root/chroot_tmpdir/scmroot/ocaml-bin-prot'...
$ git fetch origin 2688ec7229d4eec8494986d636f8a371b69b560e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-bin-prot
 * [new ref]         2688ec7229d4eec8494986d636f8a371b69b560e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2688ec7 OCaml 5.5.1 rebuild