You should now be in the directory titled ╥mac╙ (its complete pathname is ╥/pub/mac╙). This directory holds Macintosh-related files for downloading. One of the files should be a StuffIt archive containing this version of Fetch, Fetch_2.1.2.sit.hqx.
In order to move ╥Fetch_2.1.2.sit.hqx╙ from ftp.dartmouth.edu to your Macintosh you should double-click its name. Alternatively you may select its name and press either Return, Enter, or the Get File... button. You will be prompted for a name to save these files under; if you click OK the files will quickly be saved on your disk. They will be complete with their own icons and ready to be used.