ref: master
pkg/go-git-http/testdata/upload-pack.1
0086want 92eef6dcb9cc198bc3ac6010c108fa482773f116 multi_ack_detailed side-band-64k thin-pack ofs-delta agent=git/2.5.4.(Apple.Git-61) 0032want 92eef6dcb9cc198bc3ac6010c108fa482773f116 00000009done