I found this link to understand how to rename author name and email https://help.github.com/articles/changing-author-info/
But it worked for me just for the first time. Now I get this error in terminal:
Cannot create a new backup.
A previous backup already exists in refs/original/
Force overwriting the backup with -f
-f flag for the
git filter-branch command.
For example, change the first line of the script from this:
git filter-branch --env-filter '
git filter-branch -f --env-filter '