git-author-rewrite.sh

#!/bin/sh
# https://gist.githubusercontent.com/octocat/0831f3fbd83ac4d46451/raw/git-author-rewrite.sh
git filter-branch --env-filter '

OLD_EMAIL="awaxa@awaxa.com"
CORRECT_NAME="Greg Kitson"
CORRECT_EMAIL="greg.kitson@gmail.com"

export GIT_COMMITTER_DATE=$GIT_AUTHOR_DATE
if [ "$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
if [ $GIT_COMMIT = 4e595f8ecbf18ae0c6a80d65206c66cc79ce2c2b ]
then
    export GIT_AUTHOR_DATE="Thu Jul 4 13:40:23 2013 -0400"
    export GIT_COMMITTER_DATE="$GIT_AUTHOR_DATE"
fi
if [ $GIT_COMMIT = c13e6b504bb7bf6d80b20db6b9cf796dc0b88bca ]
then
    export GIT_AUTHOR_DATE="Thu Sep 12 13:29:24 2013 -0400"
    export GIT_COMMITTER_DATE="$GIT_AUTHOR_DATE"
fi
' --tag-name-filter cat -- --branches --tags