List of file changes in Git commit within build job

Summary:

Have a build job that gets triggered by new commits to main branch in a git repo.

Content (required):

Job gets triggered and starts. However how do I identify what file change triggered the job ?

for e.g. i have the job set to trigger with any *.iar file changes,

How do i identify within the Build job which specific .iar file was changed?

How can i access list of such changed files in side the build job so i can perform operations on only those files.

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