Clearification about GitOps command execution on pushed commits

in docs it was not specified that GitOps command on pushed
commit only works on latest HEAD commit and does not trigger
PipelineRun if sent on older commits.

Signed-off-by: Zaki Shaikh <zashaikh@redhat.com>

docs/content/docs/guide/gitops_commands.md

@@ -46,13 +46,15 @@ For restarting all pipeline runs:
 For restarting a specific pipeline run:
 2. Use `/retest <pipelinerun-name>` or `/test <pipelinerun-name>` within your commit message. Replace `<pipelinerun-name>` with the specific name of the pipeline run you want to restart.
 
+The GitOps command triggers a PipelineRun only on the latest commit (HEAD) of the branch and does not work on older commits.
+
 **Note:**
 
 When executing `GitOps` commands on a commit that exists in multiple branches within a push request, the branch with the latest commit will be used.
 
 This means:
 
-1. If a user specifies commands like `/retest` or `/test` without any argument in a comment on a branch, the test will automatically be performed on the **main** branch.
+1. When a user comments with commands like `/retest` or `/test` on a branch without specifying a branch name, the test will automatically run on the **default branch** (e.g. main, master) of the repository.
 
    Examples:
    1. `/retest`

pkg/provider/github/github.go

@@ -600,5 +600,5 @@ func (v *Provider) isBranchContainsCommit(ctx context.Context, runevent *info.Ev
 	if branchInfo.Commit.GetSHA() == runevent.SHA {
 		return nil
 	}
-	return fmt.Errorf("provided branch %s does not contains sha %s", branchName, runevent.SHA)
+	return fmt.Errorf("provided SHA %s is not the HEAD commit of the branch %s", runevent.SHA, branchName)
 }

pkg/provider/github/parse_payload_test.go

@@ -539,7 +539,7 @@ func TestParsePayLoad(t *testing.T) {
 			shaRet:            "samplePRshanew",
 			targetPipelinerun: "dummy",
 			wantedBranchName:  "main",
-			wantErrString:     "provided branch main does not contains sha samplePRshanew",
+			wantErrString:     "provided SHA samplePRshanew is not the HEAD commit of the branch main",
 		},
 	}
 	for _, tt := range tests {