Generic fetcher: Add lockfile #681

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Red Hat Konflux/cachi2-on-pull-request has successfully validated your commit.

Status	Duration	Name
✅ Succeeded	1 minute	init
✅ Succeeded	13 seconds	clone-repository
✅ Succeeded	7 minutes	build-container
✅ Succeeded	31 seconds	build-image-index
✅ Succeeded	1 minute	clair-scan
✅ Succeeded	40 seconds	sast-snyk-check
✅ Succeeded	15 seconds	rpms-signature-scan
✅ Succeeded	9 seconds	deprecated-base-image-check
✅ Succeeded	56 seconds	ecosystem-cert-preflight-checks
✅ Succeeded	12 seconds	apply-tags
✅ Succeeded	3 minutes	clamav-scan
✅ Succeeded	11 seconds	push-dockerfile
✅ Succeeded	18 seconds	show-summary
✅ Succeeded	8 seconds	show-sbom