I have had wonderful luck polishing out small dings and scrapes with a product called blackrock. work small amounts in vigorously and deeply (use elbow grease) with a clean soft rag. Obviously spot check any new product on your saddle before committing.
in the same breath, you may want to bring your saddle in to the closest good saddle shop (one that has a fitter, etc, on staff, not some goofball that just sells stuff) asap and have them flex your tree for you. A tree can break from a fall like that. If your horse develops any strange behavior under saddle in the months going forth, also, check for a broken tree.