CI build failures

[stephenplusplus]

@callmehiphop CI has been having a few issues with some of our git commands, it seems. Can you take a look?

npm run docs
google-cloud-node@ docs C:\projects\google-cloud-node
node ./scripts/docs
git rev-parse --abbrev-ref HEAD
HEAD
Building docs for pubsub@0.6.0
git checkout pubsub-0.6.0
HEAD is now at dbf142c... pubsub @ 0.6.0 tagged.
git checkout -
error: pathspec '-' did not match any file(s) known to git.
npm ERR! Windows_NT 6.3.9600
npm ERR! argv "node" "C:\Users\appveyor\AppData\Roaming\npm\node_modules\npm\bin\npm-cli.js" "run" "docs"
npm ERR! node v0.12.16
npm ERR! npm v3.10.9
npm ERR! code ELIFECYCLE
npm ERR! google-cloud-node@ docs: node ./scripts/docs
npm ERR! Exit status 1

https://ci.appveyor.com/project/GoogleCloudPlatform/google-cloud-node/build/1.0.591/job/cikqkf5fc2ojgxxh#L774

[stephenplusplus]

I haven't seen this pop up recently. Going to close, but if you see this again, please re-open.