This is a public beta.
Have you signed up to the public beta program and if so, installed the public beta access utility?
Otherwise, I will just say this 10.10.2 version hasn't been released yet to the public. So if that is what you are looking for, you probably still have have quite a wait yet.
We probably have quite a few more builds to go before it is released to the public.
Yeah, I'm running 10.10.2 now 14C81f - but I don't see anything to upgrade to h.