$ git clone -n https://src.fedoraproject.org/rpms/ocamlmod.git /var/lib/mock/f42-build-865904-173583/root/chroot_tmpdir/scmroot/ocamlmod
Cloning into '/var/lib/mock/f42-build-865904-173583/root/chroot_tmpdir/scmroot/ocamlmod'...
$ git fetch origin 478dc279bd4cc9d31beb9d2b89e469988d64fb77:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocamlmod
 * [new ref]         478dc279bd4cc9d31beb9d2b89e469988d64fb77 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 478dc27 OCaml 5.3.0 rebuild for Fedora 42