Git permission error when pushing to remote with new files only

I'm pushing to a remote git repo and开发者_StackOverflow中文版 I get the following on any newly created files

remote: error: git checkout-index: unable to create file

Changes to existing files are accepted, but this is obviously causing issues. Any ideas?

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You see this problem when you use Git on a case-sensitive filesystem, then attempting to push changes to a case-insensitive one.

Make sure you aren't trying to commit FOO if foo is already in the repository.