It seems like these notes aren't supported by the GUI tools (Sourcetree, Fork, etc) nor by web tools like Bitbucket, and even most commandline people don't know

It seems like these notes aren't supported by the GUI tools (Sourcetree, Fork, etc) nor by web tools like Bitbucket, and even most commandline people don't know about them... that's quite interesting, you could use them for ASCII art, jokes, and basically silliness. And perhaps in the far future, somebody finds those notes. I'm going to run the ticket number through figlet, then put it in a note for each commit.