hop of those help? Is it possible? Sure, you can clone the repository and make all necessary changes in Wayne's code. It is just a bash script. But it is listed as a requirement, and use internally, and so might be more than what you would be willing to do for this. Here is a snippet from his RVM installer file to show you how he is using it in addition to the initial curl command to kick things off, to give you an idea of the things you would need to change.
it fixes the issue It sounds like you may be missing the 'base' repo from your yum config.
yum info wget
* base: mirrors.melbourne.co.uk
Name : wget
Arch : x86_64
Version : 1.12
Release : 10.el6
Size : 1.8 M
Repo : installed
From repo : base
Summary : A utility for retrieving files using the HTTP or FTP protocols
URL : http://www.gnu.org/software/wget/
License : GPLv3+ and GFDL
Description : GNU Wget is a file retrieval utility which can use either the HTTP or
: FTP protocols. Wget features include the ability to work in the
: background while you are logged out, recursive retrieval of
: directories, file name wildcard matching, remote file timestamp
: storage and comparison, use of Rest with FTP servers and Range with
: HTTP servers to retrieve files over slow or unstable connections,
: support for Proxy servers, and configurability.