When committing anything to portage, there is a good chance that a bug number will be referenced such as if the commit closes a bug. Thus, sunrise-commit should unconditionally download the bug summary for anything that looks like a bug number. It would also be nice if sunrise-commit supported displaying multiple bug summaries if there are multiple bugs referenced in the commit message.
Yeah, I was wondering why it doesn't do that :D.
Fixed in -9999 (along with new bugzie support).
The fix was in https://github.com/mgorny/sunrise-commit/commit/7c9fcac9bb1cc113215ae1e2624022fe1ffd8077 which is now in sunrise-0.3.1, available in the mgorny overlay.