git log displaying wrong account information

["Schanzenbach, Martin" <mschanzenbach@posteo.de>]

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Hello,

there is some odd behaviour in "git log" which affects me in various ways:
For some reason, it "canonicalizes" the author/commiter information in our repository: https://git.gnunet.org/git/gnunet.git
5 years ago or so I was using another email address for commits. I have been using a different email address since that.

But if you clone this repo, and take a look at a recent commit such as be9b998b3369056c7c8fb0ae84fb4e2a064b496c using "git log", you will see that my email address is actually the old one and different from the _real_ information.
You can see that I correctly set the author/commiter email here using either cgit (https://git.gnunet.org/gnunet.git/commit/?id=be9b998b3369056c7c8fb0ae84fb4e2a064b496c) or a specific format such as

$ git log --pretty=format:"[%h] %cd - Committer: %cn (%ce), Author: %an (%ae)

This is driving me crazy as the information is just plain wrong and when our CI tries to collect a blamelist when sending out notifications, it also uses the info from "git log" instead of the actual author/commiter emails, promptly sending the reports to the wrong account.

Any idea what to do? I really do not want to rebase and rewrite thousands of commits with questionable success.
Doing that locally also does not change the output from "git log", in case you are wondering.
This problem will reemerge eventually whenever an author wants to change to another email address it seems so is this a bug?

Any help/pointers appreciated.

Martin

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