To build a mutant jQuery it would require a bit of hard work, and would probably not be worth it. You might want to read that part of the code, and cannibalize it.
For mobile fast loading pages, using a CDN version that may already be cached is often the best bet.
Another trick is to use a manifest to load once and never load again until you change the manifest.
I use manifests and the CDN versions on my mobile sites.
JΛ̊KE