You would need to download the latest RDF Wikidata dataset file, which being a single 100+ GB file and needs to be split into multiple dataset files for parallel loading as indicated in post prior to yours. Then the Virtuoso RDF Bulk Loader can be used for the optimal parallel loading of the dataset files into Virtuoso.
Note we also have a preloaded Wikidata Snapshot (Virtuoso PAGO) EBS-backed EC2 AMI available for use, which currently has an older dataset snapshot, and we are in the process of updating to the latest Wikidata dataset which should be available in the coming weeks …