Another gnucash git question

[Geert Janssens]

On zaterdag 30 april 2011, John Ralls wrote:
> Don't add branches to refs/remotes anything. Hang your working branches off
> of your local mirror-branches (trunk and 2.4 if you have one; only trunk
> is made automatically)

Can you help me understand why this is not done ? If I look with gitk, I now 
have a commit with four branches on it:
refs/remotes/origin/trunk
refs/remotes/trunk
trunk
bugfix (my working branch)

But there is nothing suggesting that my working branch if based on trunk or 
refs/remotes/origin/trunk.

For completeness, bugfix is not a tracking branch. It was simply created with
git branch bugfix
I don't know if this is correct, or if this branch should have been tracking 
trunk.

Geert