Renaming author history in git

rename-authors.sh

#!/bin/sh

# Change the author name/email
FILTER_BRANCH_SQUELCH_WARNING=1 git filter-branch --env-filter '
    export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_COMMITTER_NAME GIT_COMMITTER_EMAIL;
    GIT_AUTHOR_NAME=`echo $GIT_AUTHOR_NAME | sed -e "s/Rajesh Rajendran/rjshrjndrn/g"`;
    GIT_AUTHOR_EMAIL=`echo $GIT_AUTHOR_EMAIL | sed -e "s/rjshrjndrn@.*/rjshrjndrn@github.com/g"`;
    GIT_COMMITTER_NAME=`echo $GIT_COMMITTER_NAME | sed -e "s/Rajesh Rajendran/rjshrjndrn/g"`;
    GIT_COMMITTER_EMAIL=`echo $GIT_COMMITTER_EMAIL | sed -e "s/rjshrjndrn@.*/rjshrjndrn@github.com/g"`;
        ' \
         --tag-name-filter cat -- --all # If you want to change the entire repo
         
# Change the commit message.
# Here dropping a line.
# https://stackoverflow.com/questions/19636750/git-filter-branch-msg-filter-to-reword-a-pushed-commit-message
FILTER_BRANCH_SQUELCH_WARNING=1 git filter-branch -f --msg-filter \
'sed "s/accident secret//g"' \
--tag-name-filter cat -- --all