error & exit 1 if repository not setup or not git cloned from remote repository

[BradleyA]

fatal: ambiguous argument 'HEAD': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git [...] -- [...]'
fatal: No remote configured to list refs from.

Example to create a new repository on the command line

echo "# " >> README.md
git init
git add README.md
git commit -m "first commit"
git remote add origin https://github.com/BradleyA/test-markit-new.git
git push -u origin master

[BradleyA]

need to retest this with out access to network not sure this code is working as commented it is check if git repository not if remote access to remote repository