[llvm-dev] git question about disk space

[Bagel via llvm-dev]

If one has a free github account and clones the llvm-project repo into their 
account, what is the impact on their disk quota?  The llvm-project is huge but 
if one only changes a few files, does all the rest count against their quota or 
is some copy-on-write mechanism sharing the disk space amongst all cloners?

thanks, brian