I upgraded to Xcode 7.0 yesterday and now git commit (Command-option 'c' in Xcode) gives this diagnostic:
The local repository already exists and has many commits in it. This is a project I've been working on for an embarrassingly long time.
I did the git commands the diagnostic says but it still gives the same diagnostic. I did git config --global user.name and it returns my real and correct name, and git config --global user.email returns my real and correct email. I did these commands in the directory that contains the .git directory, and also in my home directory because I don't know whether the directory matters. I get the same (correct) response in both. I also did git config -l and everything listed looks correct and nowhere do I see the bad email address quoted in the diagnostic.
Commit in a different project gives the same diagnostic.
Maybe if I knew where that erroneous email address came from I would understand what's going on. Can somebody who understands Xcode git please say what's wrong and how to fix it?