He can't do that though can he, too many in his own party would be up in arms. All he can do is do nothing while watching if the tories can implode enough to give him a walk over.These are the people that have caused all this mess. Practically any other labour leader would have got behind the remain campaign and probably that would have been enough to swing it.
But they won't totally implode and while the lib-dems and the 50 shades of Farage will chip away at both to muddy the waters of the make up of any new Parliament
Result...IMO obvs - no real change, there'll still be too many remainers and the Brexit vote...that Parliament asked the people to speak on, will still be left hanging, twisting in the wind of indecision.