$ git clone -n https://src.fedoraproject.org/rpms/ocaml-domain-name.git /var/lib/mock/f45-build-20517-571/root/chroot_tmpdir/scmroot/ocaml-domain-name
Cloning into '/var/lib/mock/f45-build-20517-571/root/chroot_tmpdir/scmroot/ocaml-domain-name'...
$ git fetch origin 074b09f34740c55785e69094270a2b52108c0549:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-domain-name
 * [new ref]         074b09f34740c55785e69094270a2b52108c0549 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 074b09f OCaml 5.5.1 rebuild