In tog, it is possible to get the log view into a state where the status
shown in the top line of this view will always say 'loading...' instead
of showing the usual stuff like reference names, even after all commits
have already been loaded.

To reproduce this in got.git, do:

$ tog
S # switch into hsplit mode
G # move to bottom and load all commits
Enter # open a diff showing the initial import commit
- # shrink the diff view by one line; alternatively use + to grow it

Now the log view says 'loading...' and this never seems to go away.

I don't have a fix for this myself. I would be happy to test a fix.
I might eventually find time to look into it myself, but not right now.