[GIT] Export revisions with file structure

To perform an export, similar to how tortoiseSVN does which allows exporting files from one or several revisions, along with their directory structure (which is convenient for a production deployment), simply execute the following command, specifying the previous revision and the latest revision:

git diff-tree -r --no-commit-id --name-only 6c16aaab  35168851| xargs tar -rf /var/www/delivery.tar