The problem is the `--` isn't compulsory. Quick quiz, what does: git checkout x/y do? At least: * Reset a file called x/y * Check out a branch y from a remot

The problem is the `--` isn't compulsory. Quick quiz, what does: git checkout x/y do? At least: * Reset a file called x/y * Check out a branch y from a remote x * Check out a local branch called x/y