Force pull from defined origin to avoid ambiguity

[peterzhuamazon]

Is your feature request related to a problem? Please provide an existing Issue # , or describe.
Force pull from defined origin to avoid ambiguity

Describe the solution you are proposing
Previously all the calls of fetch are using string like main in branch name, but 2.2 breaks it and cause the fetch to use float which somehow breaks Grgit. Force pulling of origin/2.2 fix the issue.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.

Check List

• New functionality includes testing.
  • All tests pass
• New functionality has been documented.
  • New functionality has javadoc added
• Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[sruti1312]

BWC tests are failing with the following error,

Build file '/home/runner/work/performance-analyzer/performance-analyzer/tmp/performance-analyzer/build.gradle' line: 587

* What went wrong:
Could not determine the dependencies of task ':paBwcCluster#rollingUpgradeClusterTask'.
> No subject alternative DNS name matching ci.opensearch.org found.

[peterzhuamazon]

We have fixed the issue on ci.opensearch.org and will try again.