How to run a build from a specific old tag in gitlab ci?

Question

Continuous Delivery

I can build an artifact from a specific old tag in teamcity.
Screenshot:

How to run a build from a specific old tag in gitlab ci?
I try this gitlab-ci.yaml

variables:
  MAVEN_OPTS: "-Djava.awt.headless=true -Dmaven.repo.local=.m2/repository"
  MAVEN_CLI_OPTS: "-s maven_settings.xml --batch-mode --errors --fail-at-end --show-version"

stages:
  - build
  - release
  - build-tag

build:
  stage: build
  script:
    - mvn $MAVEN_CLI_OPTS -Dmaven.test.skip=true clean install -PRPM -U

release:
  stage: release
  script:
    - eval $(ssh-agent)
    - ssh-add <(echo "$SSH_PRIVATE_KEY")
    - git config user.name "$PUSH_USER_NAME"
    - git config user.email "$PUSH_USER_EMAIL"
    - git checkout master
    - git reset --hard origin/master
    - mvn $MAVEN_CLI_OPTS clean release:prepare -Dresume=false -DautoVersionSubmodules=true -DdryRun=false -Dmaven.test.skip=true
  when: manual

build-tag:
  stage: build-tag
  script:
    - git checkout master
    - git pull
    - git reset --hard $(git describe --abbrev=0 --tags)
    - mvn $MAVEN_CLI_OPTS -Dmaven.test.skip=true clean install -PRPM -U
  when: manual

I don't see the build-tag in the pipeline

Answer 1

• go to CI / CD -> Pipelines
  
• Press Run Pipeline
  
• under Create for choose the branch or tag you want to run the pipeline for
  
• press Create Pipeline