Veja a opção --restrict-file-names
. Embora não seja exatamente destinado a esse propósito específico, --restrict-file-names=windows
provavelmente ajudará você:
--restrict-file-names=modes
Change which characters found in remote URLs must be escaped during generation of local filenames. [...]
When "windows" is given, Wget escapes the characters \, |, /, :, ?, ", *, <, >, and the control characters in the ranges 0--31 and 128--159. In addition to this, Wget in Windows mode uses + instead of : to separate host and port in local file names, and uses @ instead of ? to separate the query portion of the file name from the rest. Therefore, a URL that would be saved as www.xemacs.org:4300/search.pl?input=blah in Unix mode would be saved as www.xemacs.org+4300/search.pl@input=blah in Windows mode.