If you forget to change your name and email intially and made several commits. So, to correct those you can use this script.

commitCorrection.md

• copy the below code in a file and save it in .sh extension.
• Configure your OLD_MAIL, CORRECT_NAMEand CORRECT_EMAIL and save the file.
• This file should be in your directory whose correction you want to do.
• run this file bash fileName.sh or ./filename
• force push the repo. git push -f origin master

commitCorrection.sh

#!/bin/sh

git filter-branch -f --env-filter '
OLD_EMAIL="oldMail@example.com"
CORRECT_NAME="correctName"
CORRECT_EMAIL="newMail@example.com"
if [ "$GIT_COMMITTER_EMAIL" = "$OLD_EMAIL" ]
then
    export GIT_COMMITTER_NAME="$CORRECT_NAME"
    export GIT_COMMITTER_EMAIL="$CORRECT_EMAIL"
fi
if [ "$GIT_AUTHOR_EMAIL" = "$OLD_EMAIL" ]
then
    export GIT_AUTHOR_NAME="$CORRECT_NAME"
    export GIT_AUTHOR_EMAIL="$CORRECT_EMAIL"
fi
' --tag-name-filter cat -- --branches --tags