Nowhere. I have yet to find a game that portrays the 308. I have seen 246, 348 and the rest, but never a 308/328/308GT4/Mondial.
Waaaaaahhhhh!!!! Not even something from "back in the day?" I suppose not....seeing that "Pong" and "Space Invaders" were the d'rigeur when it came to Video Games.....
If it makes you feel better you can claim, that the white bar in Pong was actually a 308 driving back and forth really fast (although technically that would be anachronism). Since the computer games at that time had the resolution the size of a barn door nobody can proove you wrong.