$ git clone -n https://src.fedoraproject.org/rpms/python-imageio.git /var/lib/mock/f41-build-side-2-python-2724118-30733/root/chroot_tmpdir/scmroot/python-imageio
Cloning into '/var/lib/mock/f41-build-side-2-python-2724118-30733/root/chroot_tmpdir/scmroot/python-imageio'...
$ git fetch origin 0792b13d2163df756b548b14854b1a29f0295d42:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-imageio
 * [new ref]         0792b13d2163df756b548b14854b1a29f0295d42 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0792b13 New upstream source