On a CentOS 6 server, when cloning repo from GIT, i got following error
root@server48 [~]# git clone https://github.com/gmarik/vundle ~/.vim/bundle/vundle
Cloning into /root/.vim/bundle/vundle...
fatal: Unable to find remote helper for 'https'
This is because git was installed from source and compiled with out SSL support. You need to install openssl-devel package, then recompile git if you are installing from source.
Since CentOS have GIT available in yum repo, it is better install GIT via yum.
yum install git
apt-get install git