In the synopsis of "pkg help fetch", on line two, you can see that you can't add a pkg-name if you use -o, you can only use -a, however, it does work with a pkg-name. It even tells you it is a valid option if you do a command with wrong syntax, like "pkg fetch -o ." Additionally, "pkg-name" isn't explained, though it might seem obvious, it should be explicitly said what it means when running "pkg help fetch"