Object flickering during render

So I’ve got a super simple scene, it’s one huge plane that’s reflective, and a simple low polly tree, the only animation taking place is the camera moving closer to the tree, but I’m getting a bunch of really weird flickering on the horizon and then on the bottom of the tree that I have no idea why it’s happening.

Please provide your .blend file so we can fix it and teach you how we did it.