Hiya!
tl;dr: if your repo has a patch from me[0], please merge it :)
The longer explanation for these patches is that the deployment server from which your code is fetched by targets is set via the git_server configuration variable. This variable will be updated in Puppet when the primary deployment server changes; however, updating it in every repo would be time consuming. Yesterday, I made a bunch of patches to remove this configuration variable from any repo where it is set. By removing this configuration variable from individual repos, all repos will respect the global value for git_server that is set in Puppet meaning that repo owners shouldn't have to worry about making updates when a deployment server is changed.
If you have any questions let me know via email or IRC in #wikimedia-releng.
Thank you for your help!
-- Tyler
[0]. https://gerrit.wikimedia.org/r/#/q/topic:T162814+status:open