Re: [PATCH 3/6] Allow the transport fetch command to add additional refs

> Remote helpers such as those for svn may chose to save the Git SHA1 -> Subversion
> revision mapping as notes attached to the commits (as opposed to strings in the
> commit message itself). The helper would need to update the notes on each fetch,
> but the user should not be bothered by the presence of that ref. The remote
> helper can update the notes tree through fast-import and then inform Git core
> that it should silently update the notes ref.