My commit messages have gotten extremely lazy since I start squashing all my commits down to one. I just describe the PR on the first commit message and write nonsense in all the others.
I know that if you are on the local repository where the commits were originally created they'll remain accessible through recovery methods but AFAIK orphaned commits aren't synced to other machines.
That's correct. This is for work, which uses GitHub. The dangling commits remain accessible via their sha through the web ui, so I can link them in the PR description. I don't put them in the actual commit message.
I think these are garbage collected eventually, but no idea on cadence. It's long, anyway.