fetch, n.² — Green’s Dictionary of Slang

fetch n.²

[northern dial. fetch, an apparition, a double of a living person]

1. a success; one who appeals.

1888

‘’Arry at a Radical Reception’ in Punch 12 May 219/1: Well, mate, he may be a fraud, but I’m blowed if he isn’t a ‘fetch’.

2. a likeness; thus the very fetch of, the image of.

1910

P.W. Joyce Eng. As We Speak It In Ireland (1979) 256: Fetch; what the English call a double.