Gordo Verde Breakfast Burrito

Name: Gordo Verde Breakfast Burrito
Ingredients: One 2 1/2-pound pork butt, boneless (fat on the pork makes a better final flavor), cut into 1-inch pieces; Mixed spices to taste: ground black pepper, garlic salt, celery seed, cumin; 1 tablespoon dried oregano; One 24-ounce bag frozen hash browns or breakfast potatoes; 8 tomatillos; 3 jalapeño peppers; 1 serrano pepper; 1 teaspoon minced garlic or 3 fresh cloves garlic, finely chopped; 2 tablespoons lemon or lime juice; 1 bunch fresh cilantro, chopped; One 7-ounce can diced green chiles; 2 medium white onions, finely diced; 12 eggs; One 16-ounce can refried beans; 8 large tortillas; 8 ounces shredded jack cheese; One 8-ounce tub sour cream