$ git clone -n https://src.fedoraproject.org/rpms/ocaml-ounit.git /var/lib/mock/f40-build-2013475-45891/root/chroot_tmpdir/scmroot/ocaml-ounit
Cloning into '/var/lib/mock/f40-build-2013475-45891/root/chroot_tmpdir/scmroot/ocaml-ounit'...
$ git fetch origin 30f4acc814c36a52ecca774338f839e5a2424a11:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-ounit
 * [new ref]         30f4acc814c36a52ecca774338f839e5a2424a11 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 30f4acc OCaml 5.1.1 rebuild for Fedora 40