$ git clone -n https://src.fedoraproject.org/rpms/ocaml-csexp.git /var/lib/mock/f40-build-2077261-49563/root/chroot_tmpdir/scmroot/ocaml-csexp
Cloning into '/var/lib/mock/f40-build-2077261-49563/root/chroot_tmpdir/scmroot/ocaml-csexp'...
$ git fetch origin a628ddc48256becdce2b795155ad5acf59e2de64:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-csexp
 * [new ref]         a628ddc48256becdce2b795155ad5acf59e2de64 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a628ddc OCaml 5.1.1 + s390x code gen fix for Fedora 40