Zig Reproduced Without Binaries
jakstys.lt
jakstys.lt
Disclaimer: I don't know if my comment had anything to do with this post.
On a more cynical note however, I guess this works because all of the other tools involved (eg, sha256sum, git, clang++, ... and maybe the OS and anything running under the same user) are not implemented in Zig, since if they were, they could be infected with the Ken Thompson Virus (referenced near the start of the article), affecting the checksum.