$ git clone -n https://src.fedoraproject.org/rpms/ocaml-dose3.git /var/lib/mock/f38-build-side-42-init-devel-886929-28489/root/chroot_tmpdir/scmroot/ocaml-dose3
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-886929-28489/root/chroot_tmpdir/scmroot/ocaml-dose3'...
$ git fetch origin 436a2dc6b323dad653237ec66fd43bfa3372e09b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-dose3
 * [new ref]         436a2dc6b323dad653237ec66fd43bfa3372e09b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 436a2dc Rebuild OCaml packages for F38