$ git clone -n https://src.fedoraproject.org/rpms/python-imageio.git /var/lib/mock/f45-build-31060-650/root/chroot_tmpdir/scmroot/python-imageio
Cloning into '/var/lib/mock/f45-build-31060-650/root/chroot_tmpdir/scmroot/python-imageio'...
$ git fetch origin b1ad0d9a2282f6a03f02e44fd6eacd2bbfc5998a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-imageio
 * [new ref]         b1ad0d9a2282f6a03f02e44fd6eacd2bbfc5998a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b1ad0d9 New upstream source