Fix SCM configuration for pull request jobs

Author: mark-vieira

.ci/jobs.t/elastic+elasticsearch+pull-request+docs-check.yml

@@ -4,6 +4,10 @@
     display-name: "elastic / elasticsearch # %BRANCH% - pull request docs-check"
     description: "Testing of Elasticsearch pull requests - docs-check"
     workspace: "/dev/shm/elastic+elasticsearch+%BRANCH%+pull-request+docs-check"
+    scm:
+      - git:
+          refspec: "+refs/pull/${{ghprbPullId}}/*:refs/remotes/origin/pr/${{ghprbPullId}}/*"
+          branch: "${ghprbActualCommit}"
     triggers:
       - github-pull-request:
           org-list:

.ci/jobs.t/elastic+elasticsearch+pull-request+precommit.yml

@@ -4,6 +4,10 @@
     display-name: "elastic / elasticsearch # %BRANCH% - pull request precommit"
     description: "Testing of Elasticsearch pull requests - precommit"
     workspace: "/dev/shm/elastic+elasticsearch+%BRANCH%+pull-request+precommit"
+    scm:
+      - git:
+          refspec: "+refs/pull/${{ghprbPullId}}/*:refs/remotes/origin/pr/${{ghprbPullId}}/*"
+          branch: "${ghprbActualCommit}"
     triggers:
       - github-pull-request:
           org-list:

.ci/templates.t/pull-request-gradle-unix.yml

@@ -4,6 +4,10 @@
     display-name: "elastic / elasticsearch # %BRANCH% - pull request {pr-job}"
     description: "Testing of Elasticsearch pull requests - {pr-job}"
     workspace: "/dev/shm/elastic+elasticsearch+%BRANCH%+pull-request+{pr-job}"
+    scm:
+      - git:
+          refspec: "+refs/pull/${{ghprbPullId}}/*:refs/remotes/origin/pr/${{ghprbPullId}}/*"
+          branch: "${ghprbActualCommit}"
     triggers:
       - github-pull-request:
           org-list: