Git: reset author for ALL commits

git-reset-author.bsh

#!/bin/bash

git filter-branch -f --env-filter '
OLD_EMAIL="xxxxxxxxxxxxxxxxxxxxxxxxxx"
CORRECT_NAME="zzzzzzzzzzzzzzzzz"
CORRECT_EMAIL="yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy"
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
'  HEAD