從 [git - How can I remove a commit on github? - Stack Overflow] 學到的一招，拿已經被我搞得亂七八糟的 ibus-chewing 來試：

  1. git clone git@github.com:hiroshiyui/ibus-chewing.git
  2. git reset --hard fb5c8cc104
  3. git remote add upstream git://github.com/definite/ibus-chewing.git
  4. git fetch upstream
  5. git merge upstream/master
  6. git push origin +master