useradd username
usermod -G wheel username
# change to allow sudo in the install scripts
echo "username ALL=(ALL)       NOPASSWD: ALL" >> /etc/sudoers 
su -c 'cd ~username;git clone https://github.com/username/examplerepo' username
su -c 'cd ~username/examplerepo;./install' username
# change it back for safety later
sed -i.bak '/username/d' /etc/sudoers