$ git clone -n https://src.fedoraproject.org/rpms/ocaml-gen.git /var/lib/mock/f40-build-2265318-54597/root/chroot_tmpdir/scmroot/ocaml-gen
Cloning into '/var/lib/mock/f40-build-2265318-54597/root/chroot_tmpdir/scmroot/ocaml-gen'...
$ git fetch origin e6833f0326d21dfad233598d1653862ffc844ddd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-gen
 * [new ref]         e6833f0326d21dfad233598d1653862ffc844ddd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e6833f0 OCaml 5.1.1 + s390x code gen fix for Fedora 40