Why is the prompt for updating the host key not working in git-bash (Windows) / PuTTY?

I use PuTTY for SSH keys ans git-bash for Windows.

When pushing my repository to GitHub, I get the following message:

But no matter if I enter y/n/nothing and hit Return, nothing happens, the cursor just jumps to the next line. How to solve this?

Solution

You are using PuTTY/Plink for SSH with your Git for Windows. The Plink does not work well within Git when it needs an input.

Either switch to OpenSSH.
Or just cache the github.com SSH hostkey outside of Git first.

Either from PuTTY (by trying to connect to github.com):
Or using Plink in console (cmd or bash or whatever):
```
C:\>plink github.com
```