Corbyn's last comments, that I can find:
https://www.theguardian.com/politic...ugs-off-referendum-calls-after-byelection-win
"I have said all along that we would put to parliament our proposals on a customs union on a trade relationship and the dynamic protection of consumer and workers’ rights.
As our conference resolution agreed last September, we would then be prepared to put that to a public vote. We are not at the stage yet where parliament has actually voted on that.
We could of course have a people's vote on the alternatives actually before us, Hard Brexit, Remain or the negotiated transition deal, but Corbyn explicitly rules that out, he is merely prepared 'not to rule out' a referendum on a non-existent alternative.
Corbyn is a Brexiter and always has been. You're in denial.