That depends on how many the Tory Rebels are. And the number of rebels will depend upon what is offered. And regardless of what Swinson does, she only has 14 MPs, Corbyn will need the SNP and some Tory rebels anyway. Otherwise there's no temp govt, GE doesn't happen and Boris stays on until the Queen sacks him even if he loses the no confidence. And the Queen won't sack him.
Those Tory rebels are obviously not very keen to put Corbyn at #10. And some would probably feel that by going to the polls while they are openly rebelling against their own party, they might be at high risk of deselection. Whereas more Tory MPs could probably support an interim government under Clarke that goes for a referendum first, implements the result, and then goes for a GE after.
Corbyn's main agenda anyway is social reform and Brexit gets in the way of this, particularly as it's a divisive issue within his own electorate more so than others'. His lukewarm stance, trying to appease both, is driving him and Labour down in the polls. Going into a GE with Brexit democratically "sorted" should be a reprieve for him. But I fear he prefers the crash and burn of no-deal because a) he's a brexiteer and b) he feels that Tories and Lib Dems would suffer in a post-no deal GE more than himself is suffering at the moment.
He probably feels he could recapture a lot of the current swing towards the Lib Dems due to Brexit becoming the dominant issue. Once that's done and Lib Dems have failed at their mission statement, why vote for them? But obviously his attempt at social reform would be doomed if Britain is suffering from post-no deal, harsh recession. He must know this. So I have to wonder if his personal ambition to become PM is overriding his morals, as has happened with BoJo.