Simplify fetchUpdate code

Editor assessment

`refactor(client): simplify fetchUpdate code` states the target function and the aim, but `simplify` is unmeasured — simpler how, and what made it complex? The client scope is accurate and refactor fits an internal cleanup. No body records the shape of the simplification, the risks taken, or any behavioral notes, so the message teaches nothing beyond a function name. For an internal refactor that is not fatal, and the subject is honest and clear as far as it goes. Understandable but thin: the definition of acceptable.