Set it in the morning, enjoy it for dinner!
Place the chicken into the slow cooker. In a small bowl, stir the ketchup, mustard, lemon juice, garlic powder, maple syrup, Worcestershire sauce, chili powder, cayenne pepper, and hot sauce together until you've got a well-blended sauce.
Pour the sauce over the chicken and secure the cooker lid. Set the cooker to Low and let it cook for 6 hours. When it's done, shred the chicken with two forks, and cook it on the same setting for an additional 30 minutes. Spoon some chicken and sauce onto the rolls and serve.