diff --git a/dist/index.js b/dist/index.js
index ae64f3fe9..9683c1140 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -5883,9 +5883,11 @@ class GitCommandManager {
             yield this.execGit(['lfs', 'install', '--local']);
         });
     }
-    log1() {
+    log1(format) {
         return __awaiter(this, void 0, void 0, function* () {
-            const output = yield this.execGit(['log', '-1']);
+            var args = format ? ['log', '-1', format] : ['log', '-1'];
+            var silent = format ? false : true;
+            const output = yield this.execGit(args, false, silent);
             return output.stdout;
         });
     }
@@ -6007,7 +6009,7 @@ class GitCommandManager {
             return result;
         });
     }
-    execGit(args, allowAllExitCodes = false) {
+    execGit(args, allowAllExitCodes = false, silent = false) {
         return __awaiter(this, void 0, void 0, function* () {
             fshelper.directoryExistsSync(this.workingDirectory, true);
             const result = new GitOutput();
@@ -6022,6 +6024,7 @@ class GitCommandManager {
             const options = {
                 cwd: this.workingDirectory,
                 env,
+                silent,
                 ignoreReturnCode: allowAllExitCodes,
                 listeners: {
                     stdout: (data) => {
@@ -6267,8 +6270,10 @@ function getSource(settings) {
                     yield authHelper.removeGlobalAuth();
                 }
             }
-            // Dump some info about the checked out commit
+            // Get commit information
             const commitInfo = yield git.log1();
+            // Log commit sha
+            yield git.log1("--format='%H'");
             // Check for incorrect pull request merge commit
             yield refHelper.checkCommitInfo(settings.authToken, commitInfo, settings.repositoryOwner, settings.repositoryName, settings.ref, settings.commit);
         }
diff --git a/src/git-command-manager.ts b/src/git-command-manager.ts
index 059e3d8ac..409a16191 100644
--- a/src/git-command-manager.ts
+++ b/src/git-command-manager.ts
@@ -31,7 +31,7 @@ export interface IGitCommandManager {
   isDetached(): Promise<boolean>
   lfsFetch(ref: string): Promise<void>
   lfsInstall(): Promise<void>
-  log1(): Promise<string>
+  log1(format?: string): Promise<string>
   remoteAdd(remoteName: string, remoteUrl: string): Promise<void>
   removeEnvironmentVariable(name: string): void
   revParse(ref: string): Promise<string>
@@ -254,8 +254,10 @@ class GitCommandManager {
     await this.execGit(['lfs', 'install', '--local'])
   }
 
-  async log1(): Promise<string> {
-    const output = await this.execGit(['log', '-1'])
+  async log1(format?: string): Promise<string> {
+    var args = format ? ['log', '-1', format] : ['log', '-1']
+    var silent = format ? false : true
+    const output = await this.execGit(args, false, silent)
     return output.stdout
   }
 
@@ -390,7 +392,8 @@ class GitCommandManager {
 
   private async execGit(
     args: string[],
-    allowAllExitCodes = false
+    allowAllExitCodes = false,
+    silent = false
   ): Promise<GitOutput> {
     fshelper.directoryExistsSync(this.workingDirectory, true)
 
@@ -409,6 +412,7 @@ class GitCommandManager {
     const options = {
       cwd: this.workingDirectory,
       env,
+      silent,
       ignoreReturnCode: allowAllExitCodes,
       listeners: {
         stdout: (data: Buffer) => {
diff --git a/src/git-source-provider.ts b/src/git-source-provider.ts
index 366ff3378..42a12e04e 100644
--- a/src/git-source-provider.ts
+++ b/src/git-source-provider.ts
@@ -201,9 +201,12 @@ export async function getSource(settings: IGitSourceSettings): Promise<void> {
       }
     }
 
-    // Dump some info about the checked out commit
+    // Get commit information
     const commitInfo = await git.log1()
 
+    // Log commit sha
+    await git.log1("--format='%H'")
+
     // Check for incorrect pull request merge commit
     await refHelper.checkCommitInfo(
       settings.authToken,