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Change Git commit author / email in existing commits

Docs: https://github.com/newren/git-filter-repo/blob/main/Documentation/converting-from-filter-branch.md#changing-authorcommittertagger-information and https://htmlpreview.github.io/?https://github.com/newren/git-filter-repo/blob/docs/html/git-filter-repo.html#_filtering_of_names_amp_emails_see_also_name_callback_and_email_callback

git filter-repo \
  --email-callback ' return email if email != b"OLD_EMAIL" else b"NEW_EMAIL" ' \
  --name-callback 'return name.replace(b"OLD_AUTHOR", b"NEW_AUTHOR")' \
  --force \
  --refs HEAD~<NUMBER_OF_COMMITS>..<BRANCH_NAME> # This line is optional, remove to do the change in all commits (will rewrite complete history)
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