Sometimes some repositories are removed from a given Replicant version for one reason or another. Since we mirrors the repositories we used in releases, if repositories are removed from the manifest because they contained nonfree software, we might also need to remove the repository from Replicant git hosting. This script was originally made to find out by which Replicant releases or versions a given repository is used. This way the people having find nonfree software could for instance remove or ask to the repository completely if it's not used by other Replicant versions, or go fix the former Replicant versions in one way or another.