When searching for information how to use use PuTTY with git on Windows, I came across this post: Rich Frog: Git with Putty on Windows. The first time I tried to connect to unfuddle.com, I wasn’t able to add the server’s host key to the cache. Hitting the ‘y’ key did nothing. In order to fix this, I connected manually to the host using plink with the following command:
plink git@subdomain.unfuddle.com
Then added the server’s host key to the cache. After which, connecting using git worked as expected.