You can reach up underneath the front bar with some multigrips or some pliers and try find the cable running along to the bonnet release pin - if you can get it just yank it and it release the bonnet that way.
Otherwise the really really hard way is to use a long ass flat head screwdriver and unscrew the bolt that goes into the locking mechanism from the bonnet itself - this is pretty tricky though.
Quagmire: My fellow Americans, I have not been entirely truthful with you. I did gagoogidy that girl. I gashmoygadied her gaflavity with my googus. And I am sorry.