fix: sanitize git clone repo input url

[sage-maker]

Issue #, if available:

Description of changes:

Testing done:

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[codecov]

Codecov Report

Attention: Patch coverage is 97.05882% with 1 line in your changes missing coverage. Please review.

Project coverage is 86.08%. Comparing base (d408594) to head (ad08cb4).
Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
src/sagemaker/git_utils.py	97.05%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5234      +/-   ##
==========================================
- Coverage   86.08%   86.08%   -0.01%     
==========================================
  Files         449      449              
  Lines       43623    43656      +33     
==========================================
+ Hits        37555    37580      +25     
- Misses       6068     6076       +8     

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[nargokul]

Is there any sanitization happening here or is this just validation ?

[sage-maker]

It shouldn't fix anything on the user's behalf so I think validation is a better word