On a git repo with submodules, such as the intel-iot-refkit, the yocto-autobuilder runs "git submodule update --init --recursive" to fetch the latest version of the submodules.

We occasionally see an error in that initial update call about missing objects:

From http://git.openembedded.org/bitbake
 * [new branch]      1.36       -> origin/1.36
   ed3aab9..9c0f6e8  master     -> origin/master
   60d4791..9c0f6e8  master-next -> origin/master-next
Submodule path 'bitbake': checked out '9c0f6e81dae0b91b425e6c0cdf64caa5c15d92b5'
From https://git.yoctoproject.org/git/meta-intel
   0346318..989db4c  master     -> origin/master
Submodule path 'meta-intel': checked out '989db4c0e7db84e52b4e564101a974ef59f1bba6'
From http://git.openembedded.org/meta-openembedded
   d9f7ef4..4496cb4  master     -> origin/master
 + 51fb92e...b597bcc master-next -> origin/master-next  (forced update)
Submodule path 'meta-openembedded': checked out '4a45235796df0ca1b3bca5407b9615281cf8889d'
From https://git.yoctoproject.org/git/meta-security
   1014cc6..e180062  master     -> origin/master
   3352b61..6b7ff79  master-next -> origin/master-next
 + b9e99f2...54eb59e security-wip -> origin/security-wip  (forced update)
Submodule path 'meta-security': checked out 'e180062c708483a55390a6adc1efd9e60d2681c5'
From https://git.yoctoproject.org/git/meta-yocto
   4e0ada1..6909368  master     -> origin/master
   4e0ada1..6909368  master-next -> origin/master-next
   b26cac5..b96df6e  pyro       -> origin/pyro
 * [new branch]      rocko      -> origin/rocko
Submodule path 'meta-yocto': checked out '6909368e9b193c3fc79257982ec609307a5e1ba4'
error: Unable to find 69cbe901a68e627a4c8a351f9fb67af15a07323e under http://git.openembedded.org/openembedded-core
Cannot obtain needed blob 69cbe901a68e627a4c8a351f9fb67af15a07323e
while processing commit f1dd3d54f1b104e0ab3d3857c4cdc9f6f1ecde9f.
error: Fetch failed.
Unable to fetch in submodule path 'openembedded-core'