Change Folder Sync Only New Files

I currently have an OC server running with two folder on it. Folder 1 has files 1 through 9 on it and folder 2 has all of the files within folder 1, plus an extra file. I’m currently using the owncloudcmd command to grab the contents of one folder and then the second folder. When switching to the second folder is it possible to only download the single different file?