Preheat the oven to 450 degrees F (230 degrees C).
Use a pairing knife to cut 8 small slits into the pork, about 1 ½ inches deep. Insert a garlic clove into each slit. Sprinkle pork evenly on all sides with salt and pepper. Place pork, fat-side up, in a 9x13-inch metal baking dish or Dutch oven.
Cook in the preheated oven for 30 minutes.
Reduce heat to 325 degrees F (165 degrees C). Carefully pour ¾ cup water around the sides of the pork. Cover with foil or a lid and cook for 2 ½ hours. An instant-read thermometer inserted into the center should read at least 145 degrees F (63 degrees C).
Remove from the oven and let stand for 20 minutes. Remove large fat layer and any other large pieces of fat. Pull pork apart and shred.
