If the code is under a copyleft license, then distributing a modified copy is only possible by complying with the license. So at the very least, you can get the

If the code is under a copyleft license, then distributing a modified copy is only possible by complying with the license. So at the very least, you can get the code under that license. Non-copyleft licenses might fall into a worse trap here, but that's why we have the DCO. An affidavit is more than enough.