$ git clone -n https://src.fedoraproject.org/rpms/ocaml-parmap.git /var/lib/mock/f38-build-side-42-init-devel-591395-26143/root/chroot_tmpdir/scmroot/ocaml-parmap
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-591395-26143/root/chroot_tmpdir/scmroot/ocaml-parmap'...
$ git fetch origin f49f33a209330022f39d10339adf6b2d29cfd19c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-parmap
 * [new ref]         f49f33a209330022f39d10339adf6b2d29cfd19c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f49f33a Rebuild OCaml packages for F38