fatal: detected dubious ownership in repository at '/srv/db.torproject.org/keyrings/keyring.git'

This is happening again (#41024 (closed), #41052 (closed)):

$ mr checkout account-keyring
mr checkout: /home/user/proj/tor/tpa/repos/account-keyring
Cloning into 'account-keyring'...
fatal: detected dubious ownership in repository at '/srv/db.torproject.org/keyrings/keyring.git'
To add an exception for this directory, call:

	git config --global --add safe.directory /srv/db.torproject.org/keyrings/keyring.git
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
mr checkout: command failed

mr checkout: finished (1 failed; 29 skipped)

I believe it's because of git-2.39.5-0+deb12u1 (accepted on stable on 2024-09-13) which contains a fix for:

 * CVE-2024-32004:
 
   Repositories can be configured to execute arbitrary code during local
   clones. To address this, the ownership checks introduced in v2.30.3
   are now extended to cover cloning local repositories.