$ git clone -n https://src.fedoraproject.org/rpms/ocaml-ounit.git /var/lib/mock/f40-build-2254825-54235/root/chroot_tmpdir/scmroot/ocaml-ounit
Cloning into '/var/lib/mock/f40-build-2254825-54235/root/chroot_tmpdir/scmroot/ocaml-ounit'...
$ git fetch origin c045bc0b767fa46c1becbd3b3402552880a1967a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-ounit
 * [new ref]         c045bc0b767fa46c1becbd3b3402552880a1967a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c045bc0 OCaml 5.1.1 + s390x code gen fix for Fedora 40