chore: improve controller build script to pull latest tags

[michaelhtm]

Issue #, if available:

Description of changes:
This will ensure we don't accidentally push changes if the PRs
are not up to date. Sometimes you would fetch and rebase the
changes from upstream, but the tags for some reason
always stay behind.

This change ensures the tags are going to be up to date whenever
you generate the controller

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[ack-prow]

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This pull-request has been approved by: michaelhtm
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[ack-prow]

@michaelhtm: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
verify-attribution	1508900	link	false	/test verify-attribution
s3-olm-test	1508900	link	false	/test s3-olm-test
documentdb-controller-test	1508900	link	true	/test documentdb-controller-test
acm-controller-test	1508900	link	true	/test acm-controller-test
cloudfront-controller-test	1508900	link	true	/test cloudfront-controller-test
apigatewayv2-controller-test	1508900	link	true	/test apigatewayv2-controller-test
dynamodb-controller-test	1508900	link	true	/test dynamodb-controller-test
efs-controller-test	1508900	link	true	/test efs-controller-test
eventbridge-controller-test	1508900	link	true	/test eventbridge-controller-test
ecr-controller-test	1508900	link	true	/test ecr-controller-test
eks-controller-test	1508900	link	true	/test eks-controller-test
ec2-controller-test	1508900	link	true	/test ec2-controller-test
lambda-controller-test	1508900	link	true	/test lambda-controller-test
iam-controller-test	1508900	link	true	/test iam-controller-test
pipes-controller-test	1508900	link	true	/test pipes-controller-test
prometheusservice-controller-test	1508900	link	true	/test prometheusservice-controller-test
s3-controller-test	1508900	link	true	/test s3-controller-test

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