Shell script to change your name and email in git commit history

git-commit-history-author-change.sh

#!/bin/sh

git filter-branch --env-filter '
  OLD_EMAIL="old-email@test.com"
  OLD_NAME="old name"
  CORRECT_EMAIL="new-email@test.com"
  CORRECT_NAME="new name"

  if [ "$GIT_COMMITTER_EMAIL" = "$OLD_EMAIL" ]
  then
    export GIT_COMMITTER_EMAIL="$CORRECT_EMAIL"
    export GIT_COMMITTER_NAME="$CORRECT_NAME"
  fi
  if [ "$GIT_AUTHOR_EMAIL" = "$OLD_EMAIL" ]
  then
    export GIT_AUTHOR_EMAIL="$CORRECT_EMAIL"
    export GIT_AUTHOR_NAME="$CORRECT_NAME"
  fi
  ' --tag-name-filter cat -- --branches --tags