Issue #713: fix(gha): don't crash when branch name matches file name in the repo

[jiridanek]

Description

• Fixes When PR branch is unfortunately named, it can cause ambiguities in the git commands in GHA actions #713

How Has This Been Tested?

GHA

Merge criteria:

• The commits are squashed in a cohesive manner and have meaningful messages.
• Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• The developer has manually tested the changes and verified that the changes work

[jstourac]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jstourac

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[jiridanek]

/override ci/prow/images

[openshift-ci]

@jiridanek: Overrode contexts on behalf of jiridanek: ci/prow/images

In response to this:

/override ci/prow/images

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