On our remote repository we have a folder named "feature". Below this folder there are about 200 branches. When you press F5 In Sourcetree (refresh) 150 branches disappears. Now you see only the first 50 branches. Before the feature-folder is the symbol of a folded folder ">" (but the folder is expanded). Now you have to do the following steps with the feature-folder: open, close, open, close, open. Now you can see all branches in the folder - til the next refresh.