[cytzol]

What you could do is commit half-finished work with the name “Backup”, and then commit --amend over the top of it once that piece of work has completed. This ensures your for-sync-only commits won’t get in the way of the other commits.

However, I recommend you use a separate tool for backups and syncing than the tool you use for version control. For example, you could use Rsync to push the files -- both the .git folder and your source code files -- to a remote server, and then pull them down on another computer. Not only will you only be committing for actual commits, but you can also save the state of your repository and continue working on it later; you could stage certain files and not commit them, sync your .git folder to another machine, then have those same files staged but not committed.