git修改commit的username和email

```
git filter-branch -f --env-filter \
"GIT_AUTHOR_NAME='Newname'; GIT_AUTHOR_EMAIL='newemail'; \
GIT_COMMITTER_NAME='committed-name'; GIT_COMMITTER_EMAIL='committed-email';" HEAD~3...HEAD
```
## 参考连接
1. https://stackoverflow.com/a/2920001/4884227