Remove husks from tomatillos and rinse well. Cut in half and place cut side down, along with 5 of the unpeeled garlic cloves on a foil lined baking sheet. Place under a broiler for 5-7 minutes or until skin is lightly blackened. Removed fom oven and let cool.
Roast the anaheim chilis the same way until blackened all around. Place them in a paper bag until cool. Remove from bag and peel off skin, remove seeds and stem.
Place tomatillos, skins included, into blender. Add the 5 roasted garlic cloves (skins removed), the anaheim chilis, jalapeno peppers, and cilantro. Pulse until all ingredients are finely chopped and mixed.
Season the pork cubes with salt and pepper. Heat olive oil in a large heavy bottomed skilled over medium heat and bown pork chunks well on all sides. Work in batches, don't overcrowd. Remove pork with a slotted spoon and place in bowl, set aside.
Pour off excess fat, and place the onions and 3 cloves of peeled, minced garlic in the skillet. Cook, stirring occasionally until the onion turns limp, approximately 5 minutes.
In your large soup pot add onion mixture, chili mixture, meat, 2 1/2 cups chicken stock/broth, oregano, cloves, little salt and pepper.
Bring to a boil and reduce to a light simmer. Cook for 2-3 hours until pork is fork tender. Adjust the seasoning to taste with salt and pepper.