$ git clone -n https://src.fedoraproject.org/rpms/ocamlmod.git /var/lib/mock/f45-build-20783-573/root/chroot_tmpdir/scmroot/ocamlmod
Cloning into '/var/lib/mock/f45-build-20783-573/root/chroot_tmpdir/scmroot/ocamlmod'...
$ git fetch origin 1c122ff5a1e75c41abd28ce585fb4ddb6eb4f405:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocamlmod
 * [new ref]         1c122ff5a1e75c41abd28ce585fb4ddb6eb4f405 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1c122ff OCaml 5.5.1 rebuild