[CentOS] Checksums for git repo content?

On 02/09/2017 03:12 PM, Johnny Hughes wrote:
> The patch files are in git as text files, right?  Why would you need
> checksums of those? That is the purpose of git, right?
>
Not to stir up a hornets' nest, but how does Google's announcement at 
https://shattered.it affect this now?  (Executive summary: Google has 
successfully produced two different PDF files that hash to the same 
SHA-1.)  There is a whole paragraph on 'How is GIT affected?'