$ go get -u gopkg.in/juju/charm.v6-unstable
# cd /home/nate/src/github.com/juju/errors; git pull --ff-only
You are not currently on a branch.
Please specify which branch you want to merge with.
See git-pull(1) for details.
git pull <remote> <branch>
package github.com/juju/errors: exit status 1
# cd /home/nate/src/github.com/juju/names; git pull --ff-only
From https://github.com/juju/names
8a0aa09..ab77c10 master -> origin/master
You are not currently on a branch.
Please specify which branch you want to merge with.
See git-pull(1) for details.
git pull <remote> <branch>
package github.com/juju/names: exit status 1
# cd /home/nate/src/github.com/juju/schema; git pull --ff-only
You are not currently on a branch.
Please specify which branch you want to merge with.
See git-pull(1) for details.
git pull <remote> <branch>
package github.com/juju/schema: exit status 1
# cd /home/nate/src/github.com/juju/utils; git pull --ff-only
You are not currently on a branch.
Please specify which branch you want to merge with.
See git-pull(1) for details.
git pull <remote> <branch>
package github.com/juju/utils: exit status 1
# cd /home/nate/src/github.com/juju/version; git pull --ff-only
You are not currently on a branch.
Please specify which branch you want to merge with.
See git-pull(1) for details.
git pull <remote> <branch>
package github.com/juju/version: exit status 1
# cd /home/nate/src/gopkg.in/mgo.v2; git pull --ff-only
You are not currently on a branch.
Please specify which branch you want to merge with.
See git-pull(1) for details.
git pull <remote> <branch>
package gopkg.in/mgo.v2/bson: exit status 1