It's essentially a no-lynch (except we can 'know', but not actually know since foggy could be lying about the 'always stays town' part which I'm personally a bit skeptical about anyway, if Jivvi's role is legit or not, but we can confirm that in other ways by seeing how you work as a cop) or a mislynch, depending on how fog's role works, which is kind of a coin toss.
I'm not sure I'd be happy risking lynching such a powerful role, at least today. We can keep them alive for one more day at least; if they're telling the truth, we have 2 more inno/maf reports. If they're not, we can figure that out and lynch them in the future, there's no need to rush and use up fog's ability on it from what I can see right now.