I encountered this today when the listSubmodules tests failed on my Windows machine. Debugging into it I found that the for-each-ref command was printing warnings in the `submodule-basic-setup` repository.
```warning: ignoring ref with broken name refs/remotes/origin/feature-branch?```
Further debugging lead me to a05ebffab7/app/test/fixtures/submodule-basic-setup/_git/modules/foo/submodule/packed-refs and the realization that the packed-refs file had been checked out with CRLF line endings on my Windows machine.
This should ensure that we don't ever normalize line endings in the fixture directory
