opkg-utils fetches using a cgit snapshot of a tag, which is not
reproducible as the tag could move, not reliable as a future dynamic
snapshot could have a different checksum, and a waste of CPU load as
these tarballs are built on demand.
Switch opkg-utils to use a proper git clone of the relevant SHA.
(From OE-Core rev: dafd2631a20ffd94e6f21c46938a010e92b57da4)
Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>