Bugtracker note in commit message

[Martin Stein]

I've noticed that there seems to be no convention for the note within a
commit message, about wich Github issue it addresses.
Often it looks like "This is an awesome commit. Fixes #X." as first
commit line, wich should be limited to 50 chars. Thus the phrase "Fixes
#X." wastes a lot of the documentation space. I know it's fussy, but
i'll wonder if something like "X This is an awesome commit." is fine?

Greets,
Martin