Extracted files to a separate repo.

+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+resources:
+  - ./task-s5cmd-download.yaml
+
+configMapGenerator:
+  - name: task-s5cmd-scripts
+    options:
+      disableNameSuffixHash: true
+    files:
+      - scripts/download-files.sh
+---

+#!/bin/sh
+set -ex
+had_error=0
+if [ $# -eq 0 ]; then
+	had_error=$(($had_error + 1))
+	echo "No files to download!" 1>&2
+fi
+if [ "z$DOWNLOAD_OUTPUT" = z ]; then
+	had_error=$(($had_error + 1))
+	echo "DOWNLOAD_OUTPUT variable not set!" 1>&2
+fi
+if [ $had_error -gt 0 ]; then
+	exit 1
+fi
+echo "Downloading files: $@"
+echo "  placing them in: $DOWNLOAD_OUTPUT"
+
+for item in "$@"; do
+	target="${item%%:*}"
+	source="${item#*:}"
+	/s5cmd cp "$source" "$DOWNLOAD_OUTPUT/$target"
+done

+---
+apiVersion: tekton.dev/v1beta1
+kind: Task
+metadata:
+  name: task-s5cmd-download
+spec:
+  params:
+    - name: auth-config-map
+      type: string
+      default: foo
+    - name: auth-secret
+      type: string
+      default: bar
+    - name: items
+      type: array
+    - name: s5cmd-image
+      type: string
+      default: peakcom/s5cmd
+  workspaces:
+    - name: files
+  volumes:
+    - name: task-s5cmd-scripts
+      configMap:
+        name: task-s5cmd-scripts
+        defaultMode: 0755
+
+  steps:
+    - name: download-files
+      image: $(params.s5cmd-image)
+      command: ["/task-s5cmd-scripts/download-files.sh"]
+      args: ["$(params.items[*])"]
+      env:
+        - name: DOWNLOAD_OUTPUT
+          value: $(workspaces.files.path)
+      envFrom:
+        - configMapRef:
+            name: $(params.auth-config-map)
+        - secretRef:
+            name: $(params.auth-secret)
+      volumeMounts:
+        - name: task-s5cmd-scripts
+          mountPath: /task-s5cmd-scripts
+---