What part of

   Enumerating objects: 15, done.
   Counting objects: 100% (15/15), done.
   Delta compression using up to 10 threads
   Compressing objects: 100% (8/8), done.
   Writing objects: 100% (8/8), 1.43 KiB | 1.43 MiB/s, done.
   Total 8 (delta 7), reused 0 (delta 0), pack-reused 0 (from 0)
   remote: Resolving deltas: 100% (7/7), completed with 7 local objects.

Well, since I know what a delta is, and I know what an object is, I understand all of it.