[mythtv] Access to github for Android development

[mythtv]

I'd like to poke around in the Android app, but I'm having trouble
cloning the repos. I'm using

  * git clone git at github.com <mailto:git at github.com>:MythTV/packaging.git

  * git clone git at github.com <mailto:git at github.com>:MythTV/mythtv.git

but I'm getting the error: git at github.com: Permission denied
(publickey). It seems to only be trying a public key. Do I need to be
granted access?

Thanks,

Mike