track branch we started in instead of always using master
track branch we started in instead of always using master

chintootech/scala-bootstrapper,hydro2k/scala-bootstrapper,hydro2k/scala-bootstrapper,chintootech/scala-bootstrapper,wuqiangxjtu/scala-bootstrapper,twitter/scala-bootstrapper,fizx/scala-bootstrapper,wuqiangxjtu/scala-bootstrapper,chintootech/scala-bootstrapper,hydro2k/scala-bootstrapper,wuqiangxjtu/scala-bootstrapper,twitter/scala-bootstrapper,fizx/scala-bootstrapper