crash on launch when replacing `recursive_copy` without git exclusion

[naturallymitchell]

https://github.com/jazzdotdev/torchbear/blob/5c79de30320ad88ba2c2a57c3098bc284ebf4d3d/src/bindings/system/fs.rs#L228-L232

blocking jazzdotdev/mary-poppins#38