Every so often, Chipotle create a game for you to play, and when you complete it and enter your number they’ll text you a BOGO. This iteration is a bit trippy, but in the end it’s all about the BOGO: https://www.savorwavs.com/
The coupon itself expires 8/31 but you can only get one “while supplies last”, so get on this sooner rather than later! Unfortunately, this doesn’t work on Google Voice numbers.
And in the off chance neither you nor anybody you know likes Chipotle, I am always willing to take them the coupons of your hands 😉