So I had to carry a door in my volt and I couldn't find a place to attach a bungee cord on to the hatch. So I just locked the latch with my fingers and put the bungee cord hook in the locking mechanism.
After I unloaded the door I couldn't unlatch the lock. I tried the fob and also the Unlock symbol on the center dash. I finally found a little plastic cover right above the latch so I pried it off. Inside you will see a square hole that you can insert a screwdriver into and it unlocked immediately.
Hope this helps someone.