Repository List view can have repository icons or default icons like Gitlab's icons
Just as we see icons in gitlab for repository , I propose something like this can also be introduced in the gitg , where we can use repo's icon from sources like provided links maybe or from other sources they can be discussed and iterated over , if no source is provided then we can use premade text icons just like gitlab does.
This is very noob design , just for reference , designer's can take it to next level.