$ git clone -n https://src.fedoraproject.org/rpms/ocaml-sexplib.git /var/lib/mock/f40-build-2088138-50168/root/chroot_tmpdir/scmroot/ocaml-sexplib
Cloning into '/var/lib/mock/f40-build-2088138-50168/root/chroot_tmpdir/scmroot/ocaml-sexplib'...
$ git fetch origin fe836544ab3ef944c50369b26f348efbc7400cb7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-sexplib
 * [new ref]         fe836544ab3ef944c50369b26f348efbc7400cb7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fe83654 OCaml 5.1.1 + s390x code gen fix for Fedora 40