Change Git commit author.

change-commit-author.sh

#!/bin/sh 

REPO_URL="https://github.com/USERNAME/REPO_NAME"

if [[ $REPO_URL != *".git" ]]; 
then
    REPO_URL="$REPO_URL.git"
fi

git clone --bare "$REPO_URL"

REPO_DIR=$(basename "$REPO_URL")

cd "$REPO_DIR"

git filter-branch --env-filter '
OLD_EMAIL="Your_Old_Email"
CORRECT_NAME="Your Correct Name"
CORRECT_EMAIL="Your_Correct_Email"

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

git push --force --tags origin 'refs/heads/*'