Punch dough down. On a lightly floured surface, roll each loaf into a 20 inch x 8 inch rectangle. Place one rectangle on a greased baking sheet. Spread spaghetti sauce in a 18 inch x 4 inch strip down the center. Sprinkle with oregano, pepperoni and mozzarella cheese. Fold long sides of dough up toward filling; set aside. Cut the remaining rectangle into three strips. Loosely braid strips; pinch ends to seal. Place braid on top of the cheese; pinch braid to dough to seal. Sprinkle with Parmesan cheese. Bake at 350 °F for 30 minutes or until golden brown.