搭建 gitlab 遇到 ssl 问题

搭建方式gitlab+nginx:

现在的情况是，nginx配置成http方式，可以通过ssh方式push代码，nginx配置成https方式，通过ssh方式push代码，就会出现如下错误：
/usr/local/lib/ruby/2.0.0/net/http.rb:918:in `connect': SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed (OpenSSL::SSL::SSLError)
from /usr/local/lib/ruby/2.0.0/net/http.rb:918:in `block in connect'
from /usr/local/lib/ruby/2.0.0/timeout.rb:52:in `timeout'
from /usr/local/lib/ruby/2.0.0/net/http.rb:918:in `connect'
from /usr/local/lib/ruby/2.0.0/net/http.rb:862:in `do_start'
from /usr/local/lib/ruby/2.0.0/net/http.rb:851:in `start'
from /home/git/gitlab-shell/lib/gitlab_net.rb:62:in `get'
from /home/git/gitlab-shell/lib/gitlab_net.rb:17:in `allowed?'
from /home/git/gitlab-shell/lib/gitlab_shell.rb:59:in `validate_access'
from /home/git/gitlab-shell/lib/gitlab_shell.rb:23:in `exec'
from /home/git/gitlab-shell/bin/gitlab-shell:16:in `<main>'

如果通过https push代码，就会出现fatal: could not read Username for 'https://git.******': No such file or directory

求大神指教