hg pull --verbose --rev null
sync panel. checkbox 'target'. if checked and not value selected in the combobox, then all next pulls will be 'hg pull --verbose --rev null'
A very unpleasant bug. After pushing the desired head, it is enough to make 'update', as the combobox will be empty and then pull (main toolbar) will say "nothing new"
You need to either automatically uncheck the box when the combobox becomes empty or show warning.