bash snippet to rewrite commit story author info

git-author-rewrite.sh

#!/bin/sh

git filter-branch -f --env-filter '

OLD_EMAIL="old@email.net"
CORRECT_NAME="my name"
CORRECT_EMAIL="new@email.net"

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