I don't understand Git.
-----------------------

Why am I told I'm ahead of `origin/master` by `1 commit`?

Why does it go away after what appears to be a no-op `git push`?

Here's an example interaction with `git`:

    dave@machine ~/dev/project > git status
    # On branch master
    # Your branch is ahead of 'origin/master' by 1 commit.
    #
    nothing to commit (working directory clean)

    dave@machine ~/dev/project > git pull origin master
    From github.com:davepeck/project
     * branch            master     -> FETCH_HEAD
    Already up-to-date.

    dave@machine ~/dev/project > git status
    # On branch master
    # Your branch is ahead of 'origin/master' by 1 commit.
    #
    nothing to commit (working directory clean)

    dave@machine ~/dev/project > git push origin master
    Everything up-to-date

    dave@machine ~/dev/project > git status
    # On branch master
    nothing to commit (working directory clean)