[yocto] Copy git hashes of recipes during the image build

[Yuvarajesh Valleru]

Hi,

I am building the custom yocto image regularly so that I do have so may 
versions of the image. But when an bug occured in older version images, 
I could not find the changes in source code because of AUTOREV. Is there 
any possibility to copy the hashes during the build and store in another 
recipe, so that I can have all my hashes in my target system.

Thank You,

Regards,

Rajesh