Docker: /usr/share/jenkins/ref files not updated

In jenkins-support script there is this section that copies over files under the ref directory.

if [[ ! -e $JENKINS_HOME/${rel} || $f = *.override ]]
        then
            action="INSTALLED"
            log=true
            mkdir -p "$JENKINS_HOME/${dir:23}"
            cp -r "${f}" "$JENKINS_HOME/${rel}";
        else
            action="SKIPPED"
        fi

I am extending the base lts-alpine container with some init.groovy.d scripts.

I have a few init.groovy.d scripts that configure agents/jobs/credentials. If I add new logic to one of these files it is not copied over because the file already exists.

I think it would be better for these files/directories to be managed through a hash comparison as these files do not have a version value like the plugins do.

As a work around I am making a symlink for each file so that the file gets linked to the original file.

# Make a .override file for each file so it copies it over upon jenkins startup.
RUN find /usr/share/jenkins/ref/init.groovy.d -type f -exec ln -s '{}' '{}'.override \;

Actual result

Updated files are not copied over.

Expected outcome

Updated files are copied over.