過去のcommitのユーザ名とメールアドレスを一括書き換え

rewrite_gitinfo.sh

git filter-branch -f --commit-filter '
if [ "$GIT_AUTHOR_EMAIL" = "{old email}" ];
then
    GIT_AUTHOR_NAME="{new name}"
    GIT_AUTHOR_EMAIL="{new email}"
    GIT_COMMITTER_NAME="{new name}"
    GIT_COMMITTER_EMAIL="{new email}"
    git commit-tree "$@"
else
    git commit-tree "$@"
fi' HEAD

# and then

git push -f origin master