Combine chicken broth, wine, soy sauce, sugar, ginger and garlic in shallow glass dish; whisk to blend. Add pork and turn to coat. Refrigerate at least 30 minutes and up to 3 hours.
Heat oil in heavy large skillet over medium-high heat. Drain pork and reserve marinade. Add pork to skillet and sauté until cooked through, about 5 minutes per side. Transfer pork to platter. Add marinade and green onions to same skillet. Boil until reduced to glaze, about 1 minute. Spoon glaze over pork.