docu. concerning push and remotes

Hi,

the man page of git-config explains that branch.<name>.remote has an
influence on
the default behavior of fetch. It looks like it also has an influence on
the default of push. 
This is what I was looking for. But I could not find that influence on
push documented.  

I found that I had to setup branch.<name>.remote (and
branch.<name>.merge)
entries for my branches in order to have only the current branch pushed
when I use git push without arguments.
That's what I want. If I don't have these settings all branches get
pushed.
In addition a separate remote has to exist for every branch.

Somehow I feel this should be mentioned in the man page of git-config or

git-push.

Cheers,
Michael