history_rewrite.sh

#!/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_COMMITER_EMAIL == "your@email" ]
then
    cn="Your Name"
fi
if [ $GIT_AUTHOR_EMAIL == "your@email" ]
then
    an="Your Name"
fi

export GIT_AUTHOR_NAME=$an
export GIT_AUTHOR_EMAIL=$am
export GIT_COMMITTER_NAME=$cn
export GIT_COMMITTER_EMAIL=$cm
'