Overwriting Module Template?

I'm trying to override the following template file:

modules/contrib/feed_block/templates/feed-block-rss-item.html.twig

I've tried:

custom/my_theme/feed-block-rss-item.html.twigcustom/my_theme/feed-block/feed-block-rss-item.html.twigcustom/my_theme/feed_block/feed-block-rss-item.html.twigcustom/my_theme/feed_block.html.twig

No template hints are given.

Documentation simply suggests the template be placed in /template.