$ git clone -n https://src.fedoraproject.org/rpms/python-backlash.git /var/lib/mock/f45-build-29721-640/root/chroot_tmpdir/scmroot/python-backlash
Cloning into '/var/lib/mock/f45-build-29721-640/root/chroot_tmpdir/scmroot/python-backlash'...
$ git fetch origin 0044a36d33f6715ee179c50a7c79dd615081d12a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-backlash
 * [new ref]         0044a36d33f6715ee179c50a7c79dd615081d12a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0044a36 Update to upstream.