GIT refusing to update checked out branch: refs/heads/master

To solve this issue below, simply execute this in your master repository:

"git init --bare"

The shared repository has to be a bare repository before your can push into it.

Counting objects: 5, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (2/2), done.
Writing objects: 100% (3/3), 296 bytes, done.
Total 3 (delta 1), reused 0 (delta 0)
Unpacking objects: 100% (3/3), done.
remote: error: refusing to update checked out branch:
 refs/heads/master
remote: error: By default, updating the current branch 
in a non-bare repository
remote: error: is denied, because it will make the index 
and work tree inconsistent
remote: error: with what you pushed, and will require 
'git reset --hard' to match
remote: error: the work tree to HEAD.
remote: error: 
remote: error: You can set 'receive.denyCurrentBranch' 
configuration variable to
remote: error: 'ignore' or 'warn' in the remote repository
 to allow pushing into
remote: error: its current branch; however, this is not 
recommended unless you
remote: error: arranged to update its work tree to match 
what you pushed in some
remote: error: other way.
remote: error: 
remote: error: To squelch this message and still keep the 
default behaviour, set
remote: error: 'receive.denyCurrentBranch' configuration
 variable to 'refuse'.