Case sensitive files in repo pose problem on Mac

[mauritsvanrees]

My filesystem on Mac is case insensitive. So filename foo and FOO point to the same file, and they cannot coexist as two files.
So when I clone this repo, I get this:

$ git clone git@github.com:collective/mr.bob.git
Cloning into 'mr.bob'...
...
warning: the following paths have collided (e.g. case-sensitive paths
on a case-insensitive filesystem) and only one from the same
colliding group is in the working tree:

  'mrbob/tests/templates/encodingč/mapča/ća.bob'
  'mrbob/tests/templates/encodingč/mapča/ća.bob'

I don't even see a difference in file name. Actually, I don't see a difference on GitHub either, although I do see a slightly different history, with the first file being last changed in 73abeb9, and the last one in ecf4ad6:

• https://github.com/collective/mr.bob/tree/master/mrbob/tests/templates/encodingč/mapča
• https://github.com/collective/mr.bob/tree/master/mrbob/tests/templates/encodingč/mapča

@domenkozar and @jpcw You handled these files? Can you explain what is going on here? Would it be okay to remove these files? In that someone other than me should do it, because I probably cannot actually remove them.
No big deal, I guess.