Git push error: RPC failed: curl 52

git push fails with following error

fatal: RPC failed: curl 52: Empty reply from server

The upload succeeds in case only one file was modified, added or deleted.

The following settings to don't work reliably

 git config --global --add core.compression -1

The git version is 2.8.2 running on ubuntu 14.04, and I have tried with both openssl and gnutls compilations.

ssh remotes also fail.

The problem is encountered with repositories of

bitbucketgithubgitlab

Fail safe answers appreciated