Just to let you know. You no longer have to do that!
I have fixed the download, by simply implementing a link next to "Download Snapshot". The link text is Git, just click on it and it will automatically prompt for download a tar.gz archive which you can extract with tools like WinRAR, 7-zip, IZArc and pretty much any other ZIP/RAR archive program.
You will have to remove a code from the extracted folder, though. E.g. in your case when you download TitleKey, the resulting folder after extraction as of now is called "TitleKey-master-c5cf217", you should rename that to "TitleKey" before uploading it.
Though your method works it is quite tedious, a long process and unnecessary in comparison to a simple click on a download link.
Also when you clone the main software (i.e. core) through
git clone https://gerrit.wikimedia.org/r/p/mediawiki/core.git, you download the current development version, i.e. an unstable in-progress future version being worked on by MediaWiki developers, instead of the current stable release, which you can download here: http://www.mediawiki.org/wiki/Download