`helm up` seems to fail when a charts repo is not on the master branch

[arschles]

I'm not exactly sure of the root cause here, but my ~/.helm/cache/deis repo was checked out to a branch whose remote tracking branch pointed to a branch on my fork (https://github.com/arschles/deis-charts). When I changed back to master and ran helm up, it worked again. The failure output is below:

ENG000656:builder aaronschlesinger$ helm up
---> Checking repository charts
Already up-to-date.
---> Checking repository deis
[ERROR] Not all repos could be updated: exit status 1

[slack]

This bit me when I fiddled with my remotes and removed origin...

[arschles]

ah, +1 - I forgot about that issue as well