What can I use to get rid...

It’s tough to get that smell out of leather, but here’s a suggestion. Get a large plastic garbage bag and sprinkle baking soda in it, perhaps a quarter cup. Sprinkle a bit more baking soda inside the leather bag and leave it open. Place the leather bag in the garbage bag, seal it, and let it sit for a day. If the leather bag still smells, repeat the process with a new garbage bag and new baking soda, again and again, until the smell is gone.