#!/bin/sh git filter-branch --env-filter ' an="$GIT_AUTHOR_NAME" am="$GIT_AUTHOR_EMAIL" cn="$GIT_COMMITTER_NAME" cm="$GIT_COMMITTER_EMAIL" if [ "$GIT_COMMITTER_EMAIL" = "your@email.to.match" ] then cn="Your New Committer Name" cm="Your New Committer Email" fi if [ "$GIT_AUTHOR_EMAIL" = "your@email.to.match" ] then an="Your New Author Name" am="Your New Author Email" fi export GIT_AUTHOR_NAME="$an" export GIT_AUTHOR_EMAIL="$am" export GIT_COMMITTER_NAME="$cn" export GIT_COMMITTER_EMAIL="$cm"