chore(launch): improved git fetch time by specifying a refspec and depth=1

[gtarpenning]

https://wandb.atlassian.net/browse/WB-11392

Description

Changes the origin.fetch command to only look for specific head object. master, main, and the optional passed in version.

This leads to 2-10x improvement in clone speed, depending on how many branches the target remote repo has and if the version is specified.

For example, using the wandb/examples repo had the following results.

branch	command	origin.fetch duration (s)
master	wandb launch https://github.com/wandb/examples	85.6
this PR	wandb launch https://github.com/wandb/examples	22.5
this PR	wandb launch https://github.com/wandb/examples --git-version=xyz	10.5

Testing

How was this PR tested?

Checklist

• Include reference to internal ticket "Fixes WB-NNNN" and/or GitHub issue "Fixes #NNNN" (if applicable)
• Ensure PR title compliance with the conventional commits standards

[codecov]

Codecov Report

Merging #4459 (e56b68b) into main (63941ea) will increase coverage by 0.00%.
The diff coverage is 100.00%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4459   +/-   ##
=======================================
  Coverage   83.03%   83.04%           
=======================================
  Files         258      258           
  Lines       32865    32870    +5     
=======================================
+ Hits        27290    27297    +7     
+ Misses       5575     5573    -2     

Flag	Coverage Δ
functest	56.88% <83.33%> (+0.02%)	⬆️
unittest	73.14% <100.00%> (-0.02%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
wandb/sdk/launch/utils.py	92.59% <100.00%> (+0.10%)	⬆️
wandb/filesync/step_prepare.py	93.67% <0.00%> (-1.27%)	⬇️
wandb/sdk/lib/sock_client.py	93.12% <0.00%> (-1.06%)	⬇️
wandb/sdk/wandb_run.py	90.91% <0.00%> (-0.12%)	⬇️
wandb/cli/cli.py	69.10% <0.00%> (-0.10%)	⬇️
wandb/sdk/lib/git.py	79.01% <0.00%> (ø)
wandb/sdk/internal/system/system_info.py	91.55% <0.00%> (+3.24%)	⬆️
wandb/errors/term.py	93.47% <0.00%> (+6.52%)	⬆️

[KyleGoyette]

🔥