Earlier quoted context omitted.
One little benefit of the op log is that you can use a single `jj undo` to undo all the rebased branches/bookmarks in one go. If you have rebased many branches with `git rebase --update-refs`, you need to reset each of the branches separately AFAIK.
--update-refs, --no-update-refs Automatically force-update any branches that point to commits that are being rebased. Any branches that are checked out in a worktree are not updated in this way. If the configuration variable rebase.updateRefs is set, then this option can be used to override and disable this setting.
Are you saying that that text implies that the you can undo the rebase with a single command or that all the reflogs get updated atomically? Or how is it related to the comment you replied to?