$ git clone -n https://src.fedoraproject.org/rpms/ocaml-topkg.git /var/lib/mock/f40-build-2238760-53585/root/chroot_tmpdir/scmroot/ocaml-topkg
Cloning into '/var/lib/mock/f40-build-2238760-53585/root/chroot_tmpdir/scmroot/ocaml-topkg'...
$ git fetch origin a7181bd9293f2181c80b1a3b6bba1c9c71262d9e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-topkg
 * [new ref]         a7181bd9293f2181c80b1a3b6bba1c9c71262d9e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a7181bd OCaml 5.1.1 + s390x code gen fix for Fedora 40