Fix setup.py bash cmd generation to correctly extract git info

[nelyahu]

No description provided.

[loadams]

Thanks @nelyahu!

Leaving here as a quick explainer for others, here is a sample ds_report before and after this change

Before:

DeepSpeed general environment info:
torch install path ............... ['/home/deepspeed/test/trans-venv/lib/python3.12/site-packages/torch']
torch version .................... 2.3.0+cu121
deepspeed install path ........... ['/home/deepspeed/test/trans-venv/lib/python3.12/site-packages/deepspeed']
deepspeed info ................... 0.15.5+unknown, unknown, unknown
torch cuda version ............... 12.1
torch hip version ................ None
nvcc version ..................... 12.0
deepspeed wheel compiled w. ...... torch 0.0, cuda 0.0
shared memory (/dev/shm) size .... 125.77 GB

After:

DeepSpeed general environment info:
torch install path ............... ['/home/deepspeed/test/trans-venv/lib/python3.12/site-packages/torch']
torch version .................... 2.3.0+cu121
deepspeed install path ........... ['/home/deepspeed/test/trans-venv/lib/python3.12/site-packages/deepspeed']
deepspeed info ................... 0.15.5+46d7d0d1, 46d7d0d1, patch-1
torch cuda version ............... 12.1
torch hip version ................ None
nvcc version ..................... 12.0
deepspeed wheel compiled w. ...... torch 0.0, cuda 0.0
shared memory (/dev/shm) size .... 125.77 GB