fetch-ebook-metadata(1) on Linux
The text ce50f303c131, as Debian 10 (Buster) shipped it.
fetch-ebook-metadata Fetch book metadata from online sources. You must specify at least one of title, authors or ISBN. Whenever you pass arguments to fetch-ebook-metadata that have spaces in them, enclose the arguments in quotation marks. For example: "/some path/with spaces"