Trying to be creative and frugal at the same time I decided to make my own sporran belt. I bought a 60" nice black leather dog leash and a basic buckle. I have carefully used an xacto knife to cut out the threads from the leash hardware. I now am using one of the existing fold over ends to put the buckle on. How can I sew the leather back together?

I wonder if maybe with a basic needle and strong thread I can try to re-use the same holes that appear to be machine made from the leash maker. If not, is there a basic tool that I can use? Trying to be frugal, I don't want to spend much if anything to make it happen. Gorilla Glue? Snaps? Rivets?

Your advice please.