SSH config for connecting to github and bitbucket over proxy

gistfile1.txt

ProxyCommand "C:\Program Files\git\bin\connect.exe" -H proxy.example.com:8080 %h %p

Host github.com
  HostName ssh.github.com
  Port 443
  IdentityFile C:\Users\hoge\.ssh\id_rsa
Host bitbucket.org
  HostName altssh.bitbucket.org
  Port 443
  IdentityFile C:\Users\hoge\.ssh\id_rsa

Thanks a lot man, it took me days until I found your post!
For people who might go through this in the future:
The 2nd hostname should be:
HostName altssh.bitbucket.org
instead of
bitbucket.org