Branch metainformation

It seems that ever so often there is question posted on this list on which the answer is to add '+' in 'pu' branch 'Pull:' line. I think that it is not a good policy to have puller to remember which branches can be fast-forwarded, and which needs to be merged. It should be an information set and stored by person managing the branch (pullee), as some kind of metainformation for the branch (like description and optional signature is for tags).

Perhaps then there would be a place for short, one-line description of the branch...