[LFX-pretest]: Implemented local git command to support downloading from the bare repo

[Gmin2]

1. Does this PR affect any open issues?(Y/N) and add issue references

• N
• Y

Related to #384

2. What is the scope of this PR (e.g. component or file name):

pkg/git/git.go
pkg/git/git_test.go

3. Provide a description of the PR(e.g. more details, effects, motivations or doc link):

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Other

4. Are there any breaking changes?(Y/N) and describe the breaking changes(e.g. more details, motivations or doc link):

implemented local git command to support downloading from the bare repository, and updated the cloneBare method to be private

• N
• Y

5. Are there test cases for these changes?(Y/N) select and add more details, references or doc links:

• Unit test
• Integration test
• Benchmark (add benchmark stats below)
• Manual test (add detailed scripts or steps below)
• Other

added specific test for cloneBare and checkoutCloneBare method

[Gmin2]

Can i get a review
cc @zong-zhe

[coveralls]

Pull Request Test Coverage Report for Build 10164463163

Details

• 37 of 49 (75.51%) changed or added relevant lines in 1 file are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage increased (+0.4%) to 40.261%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/git/git.go	37	49	75.51%

Files with Coverage Reduction	New Missed Lines	%
pkg/git/git.go	1	55.4%

Totals
Change from base Build 10162428116:	0.4%
Covered Lines:	3121
Relevant Lines:	7752

---

💛 - Coveralls