Missing blob object while cloning /usr/src

While trying to clone /usr/src under armv7 (Pi2v1.1) the clone fails with

root@ns2temp:/usr # git clone --depth=1 https://git.freebsd.org/src.git /usr/src
Cloning into '/usr/src'...
remote: Enumerating objects: 100811, done.
remote: Counting objects: 100% (100811/100811), done.
remote: Compressing objects: 100% (85392/85392), done.
remote: Total 100811 (delta 21471), reused 41260 (delta 11603), pack-reused 0
Receiving objects: 100% (100811/100811), 317.30 MiB | 1.08 MiB/s, done.
Resolving deltas: 100% (21471/21471), done.
fatal: missing blob object 'c41f0be5d4384c93bc223f4cd0c454831c885146'
fatal: remote did not send all necessary objects

Any hints what's wrong? In this case I don't think it's me, but....

Thanks for reading,

bob prohaska