Is anybody else seeing this when running 'git submodule update' in a
checkout of the extensions repo?
fatal: reference is not a tree: beead919cac17528f335d9409dfcada12e606ebd
Unable to checkout 'beead919cac17528f335d9409dfcada12e606ebd' in
submodule path 'MaintenanceShell'
Seems like the submodule's gotten broken somehow?
https://gerrit.wikimedia.org/r/51887 attempts to fix it manually...
-- brion