Can't fetch submodule error

[winsvega]

data/nimbus-eth1$ git submodule update
fatal: remote error: upload-pack: not our ref 7d59c6c0dd6957e9f16998ecec695f1571ca168c
fatal: the remote end hung up unexpectedly
Fetched in submodule path 'vendor/portal-spec-tests', but it did not contain 7d59c6c0dd6957e9f16998ecec695f1571ca168c. Direct fetching of that commit failed.

[advaita-saha]

If you want to update the submodules use
make update

[winsvega]

thanks!