git push with ssh causes remote end to hang up

Basically, I'm doing this on OSX

$ git --version
git version 1.7.9.6 (Apple Git-31.1)

$ git push -u origin --all
Warning: Permanently added the RSA host key for IP address '207.223.240.181' to the list of known hosts.
Counting objects: 14912, done.
Delta compression using up to 8 threads.
Compressing objects: 100% (4259/4259), done.
Write failed: Broken pipe25/14912), 6.64 MiB | 88 KiB/s
fatal: The remote end hung up unexpectedly
error: pack-objects died of signal 13
error: failed to push some refs to 'ssh://git@bitbucket.org/yzhang/reponame.git'