Get Repo

$ curl http://android.git.kernel.org/repo > ~/bin/repo
$ chmod a+x ~/bin/repo

Get Source

$ mkdir php-couchbase-memcached
$ repo init -u git://github.com/couchbase/php-memcached.git

Build

$ ./build-couchbase-memcached/build-couchbase-memcached.sh

Done.