Combine all the dry spices, including salt and pepper. Pat pork dry with paper towels, and sprinkle all over with spice mixture.
Heat oil in large skillet over medium-high heat until just smoking. Add pork and cook until well-browned, about 4 or 5 minutes per side. Transfer to large bowl, tent with foil. Let rest 5 minutes. Using 2 forks, shred into bite-sized pieces.
Meanwhile, add liquids to empty skillet, scraping up any browned bits. Simmer over medium-low until it has thickened, about 3 minutes. Stir in shredded pork. Cook until heated through, about 2 minutes. Season with salt and pepper.