So I thought I had finally got everything setup on Windows ... then ran into this issue.
Current setup
URL: ssh://user@host:port/myapp.git
Try to use absolute path to repo in a URL, that worked for me.
Instead of:
git ssh://user@host:port/myapp.git
Write:
git ssh://user@host:port//home/user/repo/myapp.git
Notice the double slash!