Can't clone projects from git@github.com

[monaka]

Describe the bug

I tried to clone via Git Clone... link in the Welcome page.
And I couldn't clone my project on GitHub with the SSH URL.
Che-Theia popped-up Git: Host key verification failed.

But there is the private key for my GitHub account in the container.
And I could clone my project via the console panel.

Che version

• latest

Steps to reproduce

0. (SSH key has been stored.)
1. Open the workspace.
2. Click Git Clone... on the Welcome page.
3. Enter the git@github.com:... style URL to the text box.
4. The error dialog was popped-up.

Expected behavior

Clones the repository with no error.

Runtime

• kubernetes (include output of kubectl version)

Client Version: version.Info{Major:"1", Minor:"15", GitVersion:"v1.15.2", GitCommit:"f6278300bebbb750328ac16ee6dd3aa7d3549568", GitTreeState:"clean", BuildDate:"2019-08-05T17:09:13Z", GoVersion:"go1.12.7", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"14", GitVersion:"v1.14.5", GitCommit:"0e9fcb426b100a2aea5ed5c25b3d8cfbb01a8acf", GitTreeState:"clean", BuildDate:"2019-08-05T09:13:08Z", GoVersion:"go1.12.5", Compiler:"gc", Platform:"linux/amd64"}

Screenshots

Installation method

• I don't know

Environment

• my computer
  • Linux
• Cloud
  • Azure

Additional context

[gorkem]

This is because known_hosts is missing the entry for github and che/theia does not handle it like the git client does when doing the cloning from the IDE.