Uses long sha version of the merged commit in MR widget copy to clipboard button

app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_merged.vue

@@ -173,7 +173,7 @@
           </a>
           <clipboard-button
             :title="__('Copy commit SHA to clipboard')"
-            :text="mr.shortMergeCommitSha"
+            :text="mr.mergeCommitSha"
             css-class="btn-default btn-transparent btn-clipboard js-mr-merged-copy-sha"
           />
         </p>

app/assets/javascripts/vue_merge_request_widget/stores/mr_widget_store.js

@@ -26,6 +26,7 @@ export default class MergeRequestStore {
     this.mergeStatus = data.merge_status;
     this.commitMessage = data.merge_commit_message;
     this.shortMergeCommitSha = data.short_merge_commit_sha;
+    this.mergeCommitSha = data.merge_commit_sha;
     this.commitMessageWithDescription = data.merge_commit_message_with_description;
     this.commitsCount = data.commits_count;
     this.divergedCommitsCount = data.diverged_commits_count;

changelogs/unreleased/48050-add-full-commit-sha.yml

+---
+title: Uses long sha version of the merged commit in MR widget copy to clipboard button
+merge_request: 19955
+author:
+type: other

spec/javascripts/vue_mr_widget/components/states/mr_widget_merged_spec.js

@@ -39,7 +39,8 @@ describe('MRWidgetMerged', () => {
         readableClosedAt: '',
       },
       updatedAt: 'mergedUpdatedAt',
-      shortMergeCommitSha: 'asdf1234',
+      shortMergeCommitSha: '958c0475',
+      mergeCommitSha: '958c047516e182dfc52317f721f696e8a1ee85ed',
       mergeCommitPath: 'http://localhost:3000/root/nautilus/commit/f7ce827c314c9340b075657fd61c789fb01cf74d',
       sourceBranch: 'bar',
       targetBranch,
@@ -153,7 +154,7 @@ describe('MRWidgetMerged', () => {
 
   it('shows button to copy commit SHA to clipboard', () => {
     expect(selectors.copyMergeShaButton).toExist();
-    expect(selectors.copyMergeShaButton.getAttribute('data-clipboard-text')).toBe(vm.mr.shortMergeCommitSha);
+    expect(selectors.copyMergeShaButton.getAttribute('data-clipboard-text')).toBe(vm.mr.mergeCommitSha);
   });
 
   it('shows merge commit SHA link', () => {