I am trying to rename a file to have different capitalization from what it had before:
git mv src/collision/b2AABB.js src/collision/B2AABB.js fatal: destinat
To bulk git mv files to lowercase on macOS:
git mv
for f in *; do git mv "$f" "`echo $f | tr "[:upper:]" "[:lower:]"`"; done
It will lowercase all files in a folder.