Started the pipeline with 'git-clone' task using config workspace is failed

Description of problem:

Start the pipeline by selecting config map value as 'config-service-cabundle'

Prerequisites (if any, like setup, operators/versions):

pipeline needs to be created with 'git-clone' task

Steps to Reproduce

Given user created pipeline "test-configmap-pipeline" with 'git-clone' task
And user created Config Map using yaml "pipeline-configMap.yaml"
When user selects "Start" option from kebab menu for pipeline "test-configmap-pipeline"
And user enters first param as "param-1"
And user selects volume type "Config Map" from workspaces dropdown
And user selects "sensitive-recipe-storage" from Config Map dropdown
And user selects Start button
Then user will be redirected to Pipeline Run Details page
And user will see Config Map Workspace "sensitive-recipe-storage" mentioned in the Workspace Resources section of Pipeline Run Details page

config-map.yaml content

apiVersion: v1
kind: ConfigMap
metadata: 
  name: sensitive-recipe-storage
data: 
  brownies: |
    1. Heat oven to 325 degrees F
    2. Melt 1/2 cup butter w/ 1/2 cup cocoa, stirring smooth.
    3. Remove from heat, allow to cool for a few minutes.
    4. Transfer to bowl.
    5. Whisk in 2 eggs, one at a time.
    6. Stir in vanilla.
    7. Separately combine 1 cup sugar, 1/4 cup flour, 1 cup chopped
       walnuts and pinch of salt
    8. Combine mixtures.
    9. Bake in greased pan for 30 minutes. Watch carefully for
       appropriate level of gooeyness.

Actual results:

Pipeline is failed with above config-map and also tried with other config maps as well

Expected results:

pipeline run should be successful

Reproducibility (Always/Intermittent/Only Once):

Always

Build Details:

4.8.0-0.nightly-2021-05-10-151546

Additional info:

Pipelines with 'git-clone' task are failed with other config maps as well

*Log snippet: *
+ [[ true == \t\r\u\e ]]
+ cleandir
+ [[ -d /workspace/output/ ]]
+ rm -rf /workspace/output//brownies
rm: cannot remove '/workspace/output//brownies': Read-only file system

Pipelines with 'git-cli' task are successful