When I go to the page as below screen shot, the page show "Jaegeuk Kim authored and bgcngm committed 18 days ago" and the "Commits on Jun 4, 2018".
But I go to the page of bgcngm's commit history page, I did not find this commit record.
My question is how this happened, and what happened at Jun 4 and 18 days ago, and how to do it.
Jaegeuk Kim authored and bgcngm committed 18 days ago: