Yes, but also remember that you'll get loud warnings about non-fast-forwards thanks to the cryptographically secure SHA1 hashes. This means that the repo admins

Yes, but also remember that you'll get loud warnings about non-fast-forwards thanks to the cryptographically secure SHA1 hashes. This means that the repo admins and downstream clones can trivially detect history rewrites for branches they have fetched. Unfortunately, there isn't a good way for code-consumers to tell if and when a non-rewrite commit or branch has been "blessed" by an admin rather than some random committer. I guess this means that the README should make some mention of the collaboration policy and the admins should preserve release power to whatever the relevant package manager is.