$ git clone -n https://src.fedoraproject.org/rpms/python-pyvo.git /var/lib/mock/f41-build-side-1-3085429-39084/root/chroot_tmpdir/scmroot/python-pyvo
Cloning into '/var/lib/mock/f41-build-side-1-3085429-39084/root/chroot_tmpdir/scmroot/python-pyvo'...
$ git fetch origin 656449a8f4a5279d7d852286cf1b9ba1313d8a7a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-pyvo
 * [new ref]         656449a8f4a5279d7d852286cf1b9ba1313d8a7a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 656449a New upstream source pyvo-1.6