brew update bug

[againstodds]

If Homebrew was updated on Aug 10-11th 2016 and brew update always says Already up-to-date. you need to run:

cd $(brew --repo); git fetch; git reset --hard origin/master; brew update

https://github.com/Homebrew/brew#update-bug

[sea516]

之前就是 ruby 2.2 装不起来 要装 homebrew ，然后也装不起来，就懵逼了。

[julyclyde]

cd 进去之后 status 了一下，确实是干净状态
branch 了一下，结果是
* master 06fe347 os/mac/ruby_keg: improve error reporting
log 了一下，结果是
commit 06fe347de97975dc01e726f87bf07a56a6fb713e
Author: Martin Afanasjew <[e-mail]>
Date: Wed Aug 10 17:56:46 2016 +0200

branch -r 显示
红色 origin/master

看起来是当前 branch 的 track 掉了？这个是咋弄掉的？？？