Update git clone of download-cache to depth=1
Update git clone of download-cache to depth=1

No need to get the full history of the download cache.

bookieio/Bookie,teodesson/Bookie,teodesson/Bookie,skmezanul/Bookie,wangjun/Bookie,bookieio/Bookie,teodesson/Bookie,bookieio/Bookie,skmezanul/Bookie,skmezanul/Bookie,adamlincoln/Bookie,teodesson/Bookie,bookieio/Bookie,adamlincoln/Bookie,wangjun/Bookie,wangjun/Bookie,charany1/Bookie,GreenLunar/Bookie,charany1/Bookie,GreenLunar/Bookie,adamlincoln/Bookie,charany1/Bookie,adamlincoln/Bookie,skmezanul/Bookie,GreenLunar/Bookie,GreenLunar/Bookie,wangjun/Bookie