git pushしたらIP addressのWarningが出た

git pushしたらIP addressのWarningが出た

bitbucket.orgにgit pushしたらwarningが出ました

$ git push -u origin --all
Warning: Permanently added the RSA host key for IP address '' to the list of known hosts.
No refs in common and none specified; doing nothing.
Perhaps you should specify a branch such as 'master'.
fatal: The remote end hung up unexpectedly
Everything up-to-date


ssh-keygen -R