Revert "Start versioning cached git clones"

This reverts commit f4fe50a0958b7b47b32041e11d4943d6ae7d3972.
dirmngr: update 1.1.1_1 bottle.
dnsmasq: update 2.72 bottle.
gpg-agent: update 2.0.26 bottle.
jemalloc: update 3.6.0 bottle.
memcached: update 1.4.20 bottle.
nginx: update 1.6.2 bottle.