Git Rename Author

git-rename-author.sh

#!/bin/sh
OLD_NAME="old"
NEW_NAME="New Oldman"
NEW_EMAIL="new.oldman@mail"

git filter-branch -f --commit-filter "
        if [ \"\$GIT_COMMITTER_NAME\" = \"$OLD_NAME\" ];
        then
                GIT_COMMITTER_NAME=\"$NEW_NAME\";
                GIT_AUTHOR_NAME=\"$NEW_NAME\";
                GIT_COMMITTER_EMAIL=\"$NEW_EMAIL\";
                GIT_AUTHOR_EMAIL=\"$NEW_EMAIL\";
                git commit-tree \"\$@\";
        else
                git commit-tree \"\$@\";
        fi" HEAD