Yes, 'stuff on remote branch I don't have (yet)' ... exactly. Sometimes, at the end of the life of a series/point release, about the only thing that is pulled is the version.php file and the environment files. Since I don't know that, running the script I use to update which backs up the site just prior to the git pull takes up space/time, etc.
Even if 'the long list of fixes' could be found individually, I'd kinda like to be forewarned with each update if possible ... by forewarned I mean if I had a listing of file changes I have info for investigating. Would turn on debugging anyway for hickups.
Now that's core ... most of the time, no issues ... however, could treat plugins the same way IF provider of plugin has a git repo. The add on info would be useful, me thinks.
Granted most folks aren't that 'curious'! ;)
'spirit of sharing', Ken