devtool_add_gRPC_fails

devtool add https://github.com/grpc/grpc.git
NOTE: Starting bitbake server...
NOTE: Starting bitbake server...
NOTE: Fetching git://github.com/grpc/grpc.git;protocol=https...
Loading cache: 100% |##########################################################################################################################| Time: 0:00:06
Loaded 2721 entries from dependency cache.
Parsing recipes: 100% |########################################################################################################################| Time: 0:00:00
Parsing of 1933 .bb files complete (1931 cached, 2 parsed). 2723 targets, 68 skipped, 0 masked, 0 errors.
NOTE: Resolving any missing task queue dependencies

Build Configuration:
BB_VERSION           = "1.36.0"
BUILD_SYS            = "x86_64-linux"
NATIVELSBSTRING      = "universal"
TARGET_SYS           = "i586-poky-linux"
MACHINE              = "qemux86"
DISTRO               = "poky"
DISTRO_VERSION       = "2.4.1"
TUNE_FEATURES        = "m32 i586"
TARGET_FPU           = ""
meta
meta-poky
meta-yocto-bsp
meta-python
meta-networking
meta-oe
meta-openclovis
meta-intel           = "<unknown>:<unknown>"
meta-agema           = "agema_rocko:dcdf1f42c1e5bbeb4cca12447aeda1d325701604"
workspace            = "master:bc5adf72285581da9e16533cd5879607915ad88b"

Initialising tasks: 100% |#####################################################################################################################| Time: 0:00:00
NOTE: Executing RunQueue Tasks
NOTE: Tasks Summary: Attempted 2 tasks of which 0 didn't need to be rerun and all succeeded.
NOTE: Fetching submodules...
NOTE: Scanning paths for packages & dependencies: .
NOTE: Using default source tree path /home/yocto/dev/build_qemu/workspace/sources/grpc
NOTE: Starting bitbake server...
Traceback (most recent call last):
  File "/home/yocto/dev/poky/scripts/devtool", line 331, in <module>
    ret = main()
  File "/home/yocto/dev/poky/scripts/devtool", line 318, in main
    ret = args.func(args, config, basepath, workspace)
  File "/home/yocto/dev/poky/scripts/lib/devtool/standard.py", line 243, in add
    setup_git_repo(srctree, args.version, 'devtool', d=tinfoil.config_data)
  File "/home/yocto/dev/poky/scripts/lib/devtool/__init__.py", line 223, in setup_git_repo
    bb.process.run('git checkout -b %s' % devbranch, cwd=repodir)
  File "/home/yocto/dev/poky/bitbake/lib/bb/process.py", line 178, in run
    raise ExecutionError(cmd, pipe.returncode, stdout, stderr)
bb.process.ExecutionError: Execution of 'git checkout -b devtool' failed with exit code 128:
fatal: Not a git repository: /home/yocto/dev/build_qemu/tmp/work/recipetool-xw7bl9zh/source/git/.git/modules/third_party/bloaty/modules/third_party/googletest
fatal: 'git status --porcelain' failed in submodule third_party/bloaty