$ git clone -n https://src.fedoraproject.org/rpms/python-brian2.git /var/lib/mock/f42-build-874075-178786/root/chroot_tmpdir/scmroot/python-brian2
Cloning into '/var/lib/mock/f42-build-874075-178786/root/chroot_tmpdir/scmroot/python-brian2'...
$ git fetch origin f9433c8ac61ea53aae59bedb3b5e8fb23d0c82db:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-brian2
 * [new ref]         f9433c8ac61ea53aae59bedb3b5e8fb23d0c82db -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f9433c8 Update to 2.8.0.4 upstream release