$ git clone -n https://src.fedoraproject.org/rpms/ocaml-ctypes.git /var/lib/mock/f39-build-1872696-42725/root/chroot_tmpdir/scmroot/ocaml-ctypes
Cloning into '/var/lib/mock/f39-build-1872696-42725/root/chroot_tmpdir/scmroot/ocaml-ctypes'...
$ git fetch origin 130e2388cacbf72fc5c31d9f6842056c53df11f0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-ctypes
 * [new ref]         130e2388cacbf72fc5c31d9f6842056c53df11f0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 130e238 Version 0.21.1