$ git clone -n https://src.fedoraproject.org/rpms/erlang-getopt.git /var/lib/mock/f40-build-1777679-24803/root/chroot_tmpdir/scmroot/erlang-getopt
Cloning into '/var/lib/mock/f40-build-1777679-24803/root/chroot_tmpdir/scmroot/erlang-getopt'...
$ git fetch origin ccffa77b0dfa8687b0252e6ffb702000b3016532:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/erlang-getopt
 * [new ref]         ccffa77b0dfa8687b0252e6ffb702000b3016532 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ccffa77 getopt ver. 1.0.3