GITcorrectAuthorAndCorrectCommitDateAfterRebase.sh

# make sure user.name and user.email are set correctly this time

# check with
git log --format=fuller

# fix author
git rebase -i --root -x "git commit --amend --author 'John Doe <john.doe@example.org>' -CHEAD"

# fix date of commit to date of authoring
git filter-branch --env-filter '
if [ "$GIT_AUTHOR_DATE" != "$GIT_COMMITTER_DATE" ]; then
  export GIT_COMMITTER_DATE="$GIT_AUTHOR_DATE"
fi
' --tag-name-filter cat -- --branches --tags