Geo: Provide feedback that push to primary actually happened

If you do a SSH push to the primary, the push looks like it went to the secondary, when in fact, it went to the primary:

$ git push
Counting objects: 3, done.
Delta compression using up to 8 threads.
Compressing objects: 100% (3/3), done.
Writing objects: 100% (3/3), 343 bytes | 343.00 KiB/s, done.
Total 3 (delta 1), reused 0 (delta 0)
To geo-secondary.com:root/plain-html.git
   7318727..ae78f20  master -> master

@ash.mckenzie Can we inject some feedback into this status that it was proxied to the primary?