change git author emails by REWRITING HISTORY

git-mail-change.sh

git filter-branch --commit-filter '
        if [ "$GIT_COMMITTER_EMAIL" = "WRONG_EMAIL" ];
                    then
                        GIT_COMMITTER_EMAIL="NEW_EMAIL";
                        GIT_AUTHOR_EMAIL="NEW_EMAIL";
                        git commit-tree "$@";
                    else
                        git commit-tree "$@";
                    fi' HEAD