What is the equivalent to magit pull with rebase flag using fetch instead?

Question

In magit I often use F -r u to pull and rebase my commits on top of the latest from origin. The inefficient part for me when I do this is I often go to the GitHub first to actually see what’s new before pulling. To avoid that step I used fetch instead f u and that gives me an unpulled section in the status buffer. I merged it with m i for “merge into” my HEAD but this unfortunately wasn’t the same and made the history nonlinear locally which I had to fix. How should I have / do I achieve the same result as the F -r u if I first fetch instead?