What about hash collision? You could write an obfuscator to keep appending useless code or comments to the payload to continually generate commit hashes until you get a collision with the same original hash. A lot of work of course, and the hash is so f-ing huge it might take a few thousand compute-years, but you know, hackers find a way. If nothing else, use the full 40-char hash to ensure that your attacker has to find the same atom twice across 10 moons.

Your own startup will probably be 12hr/7day until it's funded or otherwise self-sufficient.

It could be 9hr/4day, and you will do that until you run out of capital after 1800 work hours.