[yocto] BB_NO_NETWORK and own-mirrors not working with meta-systemd

[Evade Flow]

To bring this full circle... if you want to build behind a restrictive
firewall using pre-mirrored sources and BB_NO_NETWORK, be aware that
recipes which:

  1. Specify a git repo as the source, and,

  2. Specify the revision to be built using a tag name


will cause your build to abort when bitbake tries to run 'git ls-remote'
to resolve the tag name.  So don't specify SRC_URI like this:


  SRC_URI = "git://git.kernel.org/pub/scm/utils/kernel/kmod/kmod.git;protocol=git;tag=v${PV}"

Instead, use:

  SRC_URI = "git://git.kernel.org/pub/scm/utils/kernel/kmod/kmod.git;protocol=git;tag=8885ced062131214448fae056ef453f094303805;branch=master"


I added a note about this to the Wiki:

  - http://wiki.yoctoproject.org/wiki/How_do_I#Non-networked_Builds_and_Cached_Git_Respositories

I'm still new to Yocto, so someone please chime in if any of this
information is incorrect...