$ git clone -n https://src.fedoraproject.org/rpms/erlang-gproc.git /var/lib/mock/f45-build-8330-384/root/chroot_tmpdir/scmroot/erlang-gproc
Cloning into '/var/lib/mock/f45-build-8330-384/root/chroot_tmpdir/scmroot/erlang-gproc'...
$ git fetch origin 40e9f10e119ccd31e0436d26a0a682ccf40199df:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/erlang-gproc
 * [new ref]         40e9f10e119ccd31e0436d26a0a682ccf40199df -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 40e9f10 gproc ver. 1.3.0