The Tony Hawk Burrito, made with brown rice, black beans, chicken, tomatillo-red chili salsa, and guacamole, is available on both the official Chipotle app and website until August 14. The first 2,000 people to order it will get access to the game's Warehouse demo.
After ordering with a valid Chipotle account, those 2,000 people will get a redemption code in their email associated with the account. Punch the code into your respective system and you'll get access to the demo.