I've been struggling with this for the past few days and figured out a solution, at least for current branch. None of the suggestion I tried have worked, but the following does.
Delete the existing content.
Under Deployment Type, Modify the path for the content location to anything small so it goes fast.
Distribute the content. You may be able to skip this step I haven't tested it.
Delete the content.
Change the path back to the original content location.
Distribute the content.
You can view the content under SCCMContentLib\DataLib\Content......
hth