Comment 2 for bug 1871827

Workaround:
$ sudo mount -o bind /usr/bin/ssh /snap/core/current/usr/bin/ssh

Still fails:
$ git-ubuntu submit
04/30/2020 04:34:15 - ERROR:Unable to create merge proposal: HTTP Error 400: Bad Request
Response headers:
---
connection: close
content-length: 40
content-security-policy: frame-ancestors 'self';
content-type: text/plain;charset=utf-8
date: Thu, 30 Apr 2020 03:34:15 GMT
server: zope.server.http (HTTP)
status: 400
strict-transport-security: max-age=15552000
vary: Accept
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
x-launchpad-revision: fbdff7602bd10fb883bf7e2ddcc7fd5a16f60398
x-lazr-notifications: []
x-powered-by: Zope (www.zope.org), Python (www.python.org)
x-xss-protection: 1; mode=block
---
Response body:
---
b'merge_target: Required input is missing.'
---