[Q] Restore apps after clean installation of 5.0.2 Roms topic

Hi everybody, after a clean installation of every cm12 based rom at the first boot it asks to restore previous installed apps related to a google account. I noticed that even if I sync everything in settings->accounts->google->"my-email" after the flash the app list isn't update. So my question is: what I have to do for having that list updated before I make a clean installation?
Thank you ;)