change git user and email for previous commits

git filter-branch --commit-filter \
  'if [ "$GIT_AUTHOR_NAME" = "OLD-NAME" ]; then \                                                                                                 
      export GIT_AUTHOR_NAME="NEW-NAME";\                                                                                                               
      export GIT_AUTHOR_EMAIL=NEW-EMAIL;\                                                                                                        
      export GIT_COMMITTER_NAME="NEW-NAME";\                                                                                                            
      export GIT_COMMITTER_EMAIL=NEW-EMAIL;\                                                                                                     
  fi;\                                                                                                                                              
git commit-tree "$@"'