Use a screwdriver to release the hood latch through the front grille. Take a look at the hood latch on another car to get an idea of how they work.
HOW DO I OPEN HOOD ON CAR WHEN CABLE IS BROKEN
how to open hood with a broken cable on a 1994 ford explorer
dodge truck broken hood latch
If the cable isn't broken then you shouldn't have any issues opening the hood...
cable broke release latch for the hood can't open it
you get the cable fixed then open it
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Sawsall
If the hood cable is broken on a Geo Prizm, the only option is to open the hood from underneath the vehicle. It is best to put the car up on a hoist and use a pole to trip the hood latch.
If the cable release is broken for the hood on a 2002 Kia Spectra, a person could crawl under the car and see if they can locate the broken part of the cable. If it is still attached to the hood, they could pull it to trip the hood latch. Otherwise, the car will have to be put on a hoist, and a long pole used to trip the hood latch.
Hood release cable has connector nuts on both ends of the cable. Loosen the connector nuts. Remove the cable retainers. The cable will come off and can be replaced with a new hood release cable.
If it is just the plastic handle broken, behind that is the cable that opens the hood. Just grab the cable with a pair of pliers and pull. You can probably just replace the inside handle and not have to run a new cable.