$ git clone -n https://src.fedoraproject.org/rpms/ocaml-ounit.git /var/lib/mock/f42-build-865811-173520/root/chroot_tmpdir/scmroot/ocaml-ounit
Cloning into '/var/lib/mock/f42-build-865811-173520/root/chroot_tmpdir/scmroot/ocaml-ounit'...
$ git fetch origin 8462c0cda7463a0eefe75901b6202581816e0fe4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-ounit
 * [new ref]         8462c0cda7463a0eefe75901b6202581816e0fe4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8462c0c OCaml 5.3.0 rebuild for Fedora 42