This isn't easy, but it works. I went through all my old emails from WikiTree, from when I uploaded the GEDCOMs. There were many. Copy the GEDCOM links from the email into a file. Now, all the links are in one location. Clicking on any one of the links shows all the individuals that were upload (with their link) and which ones were skipped. You can also download the old raw GEDCOM file.
These links will probably be kept on WikiTree forever. Only the person that uploaded them have access to the link.