Use `git filter-branch` to do some processing on all commits of a branch

Git-edit-commits.sh

#!/bin/bash

git filter-branch --env-filter '
WRONG_EMAIL="john@example.com"
NEW_NAME="John Doe"
NEW_EMAIL="doe@exmaple.com"

if [ "$GIT_COMMITTER_EMAIL" = "$WRONG_EMAIL" ]
then
    export GIT_COMMITTER_NAME="$NEW_NAME"
    export GIT_COMMITTER_EMAIL="$NEW_EMAIL"
fi
if [ "$GIT_AUTHOR_EMAIL" = "$WRONG_EMAIL" ]
then
    export GIT_AUTHOR_NAME="$NEW_NAME"
    export GIT_AUTHOR_EMAIL="$NEW_EMAIL"
fi
' --tag-name-filter cat -- --branches --tags