Feature request: Store comments on branches

Hi,

I regulary work with various branches, that I call by the number
of an associated bug tracking / support tracking number. That
makes it clear to which ticket a given branch belongs.
In this case I would find it very useful, if I could associate
short comments with a branch, which would be shown when
doing a 'git branch'. This way I could see what this branch
about, without looking up the ticket information.

Obvious the workaround is to name the branches different,
but this is sometimes not convenient and may result in quiet
long branch names.

What do others think about this? Would this be useful
for others, too?

Best Regards,
Patrick