Even assuming that Git is unassailable with a billion dollar budget:
How long has the Linux kernel been under development?
How long has it been version controlled using Git?
How long has it been a potential target of state sponsored espionage agencies?
The potential adversaries have been taking cryptography and security seriously since long before the Linux community. They have larger budgets and significant expertise backed by patriotism and economic rewards.
Compared to pulling a nuclear submarine wreck from the depths of the Pacific, Git might not appear so difficult.
How long has the Linux kernel been under development?
How long has it been version controlled using Git?
How long has it been a potential target of state sponsored espionage agencies?
The potential adversaries have been taking cryptography and security seriously since long before the Linux community. They have larger budgets and significant expertise backed by patriotism and economic rewards.
Compared to pulling a nuclear submarine wreck from the depths of the Pacific, Git might not appear so difficult.