$ git clone -n https://src.fedoraproject.org/rpms/ocaml-ctypes.git /var/lib/mock/f38-build-side-42-init-devel-723151-27298/root/chroot_tmpdir/scmroot/ocaml-ctypes
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-723151-27298/root/chroot_tmpdir/scmroot/ocaml-ctypes'...
$ git fetch origin 953679edbe7b01c34f19903bd1945fe8d052c974:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-ctypes
 * [new ref]         953679edbe7b01c34f19903bd1945fe8d052c974 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 953679e Rebuild OCaml packages for F38