Hello,
As I mentioned in my `git update` patch series [1], I spent several days re-reading old threads looking for anything related to `git pull` and fast-forward throughout the entire history of the git mailing list.
I documented everything that I found of interest, and the result is a pretty lengthy article.
Long story short: a new `git update` command fixes all the issues people have been reporting for almost a decade now.
Even if it's not a particularly interesting read, it's a good reference that records all the attempts that have been made, along with many ideas and proposals.
https://felipec.wordpress.com/2021/07/05/git-update/
[1] https://lore.kernel.org/git/20210705123209.1808663-1-felipe.contreras@gmail.com/
-- Felipe Contreras