diff --git a/scan/dist/index.js b/scan/dist/index.js
index da42bcf7..40372a72 100644
--- a/scan/dist/index.js
+++ b/scan/dist/index.js
@@ -135150,21 +135150,42 @@ var require_utils10 = __commonJS({
     }
     __name(getInputs, "getInputs");
     function getPrSha() {
-      if (process.env.QODANA_PR_SHA) {
-        return process.env.QODANA_PR_SHA;
+      return __awaiter3(this, void 0, void 0, function* () {
+        if (process.env.QODANA_PR_SHA) {
+          return process.env.QODANA_PR_SHA;
+        }
+        if (github2.context.payload.pull_request !== void 0) {
+          const output = yield gitOutput([
+            "merge-base",
+            github2.context.payload.pull_request.base.sha,
+            github2.context.payload.pull_request.head.sha
+          ]);
+          if (output.exitCode === 0) {
+            return output.stdout.trim();
+          } else {
+            return github2.context.payload.pull_request.base.sha;
+          }
+        }
+        return "";
+      });
+    }
+    __name(getPrSha, "getPrSha");
+    function getHeadSha() {
+      if (process.env.QODANA_REVISION) {
+        return process.env.QODANA_REVISION;
       }
       if (github2.context.payload.pull_request !== void 0) {
-        return github2.context.payload.pull_request.base.sha;
+        return github2.context.payload.pull_request.head.sha;
       }
-      return "";
+      return github2.context.sha;
     }
-    __name(getPrSha, "getPrSha");
+    __name(getHeadSha, "getHeadSha");
     function qodana(inputs_1) {
       return __awaiter3(this, arguments, void 0, function* (inputs, args = []) {
         if (args.length === 0) {
           args = (0, qodana_12.getQodanaScanArgs)(inputs.args, inputs.resultsDir, inputs.cacheDir);
           if (inputs.prMode) {
-            const sha = getPrSha();
+            const sha = yield getPrSha();
             if (sha !== "") {
               args.push("--commit", sha);
             }
@@ -135172,7 +135193,7 @@ var require_utils10 = __commonJS({
         }
         return (yield exec.getExecOutput(qodana_12.EXECUTABLE, args, {
           ignoreReturnCode: true,
-          env: Object.assign(Object.assign({}, process.env), { NONINTERACTIVE: "1" })
+          env: Object.assign(Object.assign({}, process.env), { QODANA_REVISION: getHeadSha(), NONINTERACTIVE: "1" })
         })).exitCode;
       });
     }
@@ -135469,6 +135490,12 @@ ${comment_tag_pattern}`;
       });
     }
     __name(git, "git");
+    function gitOutput(args_1) {
+      return __awaiter3(this, arguments, void 0, function* (args, options = {}) {
+        return yield exec.getExecOutput("git", args, options);
+      });
+    }
+    __name(gitOutput, "gitOutput");
     function createPr(title, repo, base, head) {
       return __awaiter3(this, void 0, void 0, function* () {
         const prBodyFile = path_1.default.join(os.tmpdir(), "pr-body.txt");