Oh that ship already sailed. Click on the "parent" link. Notice that it breaks your browser history now because instead of being a link to an element in the document it runs some javascript to scroll the page… commence teeth gnashing.
This is why, on almost every website I visit where I know I'll be opening multiple links (which would normally require hitting the back button to view them all), I just open every link in a new tab and then close the tab when finished.
I suspect many people use HN (and similar) this way.
It's always a fun time when I occasionally use the browser/website "as intended" and hit the back button, but the scroll position has been completely lost so it takes a bit to find the exact place I was looking originally.