avoid redundant adjusted branch update in sync

sync still does update it if the config would otherwise not, since it
already did.

Command/Sync.hs

@@ -407,17 +407,17 @@ updateBranches (Nothing, _) = noop
 updateBranches (Just branch, madj) = do
 	-- When in an adjusted branch, propigate any changes made to it
 	-- back to the original branch. The adjusted branch may also need
-	-- to be updated, if the adjustment is not stable.
+	-- to be updated, if the adjustment is not stable, and the usual
+	-- configuration does not update it.
 	case madj of
 		Nothing -> noop
 		Just adj -> do
 			let origbranch = branch
 			propigateAdjustedCommits origbranch adj
-			unless (adjustmentIsStable adj) $ do
-				showSideAction "updating adjusted branch"
-				let adjbranch = originalToAdjusted origbranch adj
-				unlessM (updateAdjustedBranch adj adjbranch origbranch) $
-					warning $ unwords [ "Updating adjusted branch failed." ]
+			unless (adjustmentIsStable adj) $
+				annexAdjustedBranchRefresh <$> Annex.getGitConfig >>= \case
+					0 -> adjustedBranchRefreshFull adj origbranch
+					_ -> return ()
 					
 	-- Update the sync branch to match the new state of the branch
 	inRepo $ updateBranch (syncBranch branch) branch