virtest inconsistency

[PhilipDeegan]

git clone https://github.com/VcDevel/Vc -b master --depth 10 --recurse-submodules --shallow-submodules 
Cloning into 'Vc'...
remote: Enumerating objects: 369, done.
remote: Counting objects: 100% (369/369), done.
remote: Compressing objects: 100% (283/283), done.
remote: Total 369 (delta 141), reused 144 (delta 74), pack-reused 0
Receiving objects: 100% (369/369), 564.27 KiB | 1.06 MiB/s, done.
Resolving deltas: 100% (141/141), done.
Submodule 'tests/virtest' (https://github.com/mattkretz/virtest) registered for path 'tests/virtest'
Cloning into '/home/philix/git/Vc/tests/virtest'...
remote: Enumerating objects: 28, done.        
remote: Counting objects: 100% (28/28), done.        
remote: Compressing objects: 100% (26/26), done.        
remote: Total 28 (delta 6), reused 8 (delta 0), pack-reused 0        
remote: Total 0 (delta 0), reused 0 (delta 0), pack-reused 0
error: Server does not allow request for unadvertised object 06a1800177426443dc5c7c228e2461ef6f9e5d95
Fetched in submodule path 'tests/virtest', but it did not contain 06a1800177426443dc5c7c228e2461ef6f9e5d95. Direct fetching of that commit failed.