Failure to Build Blobber

I am struggling to make it past this step in spinning up a blobber:

Setup, Config testnet0 and build blobber(s)

./docker.local/bin/blobber.init.setup.sh

docker network create --driver=bridge --subnet=198.18.0.0/15 --gateway=198.18.0.255 testnet0

./docker.local/bin/build.blobber.sh

I’m running a rig at Teraswitch with all recommended specs including Ubuntu 20.04 LTS.
It appears to fail at trying to connect to codeload.github.com

Here is the error message:

root files:
image

Any help would be appreciated. Thanks

Fixed.

Removed: git checkout