[Git Summary] Show email address

[ghost]

I need the email address on the summary to work easier with git reauthor

[hemanth]

I would vote for passing a flag to author rather than having the -e flag hardcoded.

[nicolaiskogheim]

I would vote for passing a flag to author

Just my thoughts as well.

[bl-ue]

I think we should close this PR. It's old, has conflicts, and the author is obviously not coming back... And there are clearly no intentions to fix it per the collaborators comments above.