Liquibase init copy - only for s3?

I’m trying to utilize the liquibase init copy command to be able to point to a specific folder in a project and copy all of the liquibase changelog and changesets into another directory, I’m getting an error message that this is only supported for s3, but the docs do not have any information on this topic. Has anyone been able to use this command to copy a liquibase project in the past?