From Camaro Wiki
A hatchback is a term used in reference of a car's trunk access. Normally, sedans and coupes will have a trunk lid that comes up just like a hood. The trunk lid and the rear window are one piece on some cars, making a "hatch." This allows much more cargo room and ease of use than normal trunks.
The majority of vehicles so called as a hatchback are small people movers that have the similar shape of a station wagon. But in rare instances, a vehicle like the third and fourth generation Camaro will have one for either aesthetic or practical purpose.