Hi, I'm the Han-Wen from the title.

The story mentions git because git5 got me into developer tooling. More in particular, it put me in touch with Shawn Pearce who ran the Git/Gerrit team at Google. When I went to work for him, Shawn wanted to have codesearch support in Gerrit, and Zoekt was ultimately the outcome of my explorations in this space.

IIRC, Git5 was deleted approximately 5 years ago because Fig (the Hg based replacement) had taken over all the use cases