Alitalia MilleMiglia - FCO layover/checked baggage

I searched the forum but didn't come up with a conclusive answer, nor could I find an answer in Alitalia's CoC. Going PEK-FCO-KBP in a few weeks with an overnight (22 hour) layover in Rome. I'm planning to leave the airport to spend the night in the city. Will I be able to retrieve checked baggage at FCO or will I have to check it all the way through to KBP? Thanks.

If you ask to retrieve your bags at FCO when checking in at PEK they won't check them through to KBP