diff --git a/pom.xml b/pom.xml
index a7c7d488..8510518e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -69,7 +69,7 @@
     <changelist>-SNAPSHOT</changelist>
     <jenkins.version>2.138.4</jenkins.version>
     <java.level>8</java.level>
-    <scm-api.version>2.4.1</scm-api.version>
+    <scm-api.version>2.4.2-SNAPSHOT</scm-api.version>
     <git-plugin.version>3.10.0</git-plugin.version>
   </properties>
 
diff --git a/src/main/java/jenkins/branch/BranchNameContributor.java b/src/main/java/jenkins/branch/BranchNameContributor.java
index 79604915..f551100d 100644
--- a/src/main/java/jenkins/branch/BranchNameContributor.java
+++ b/src/main/java/jenkins/branch/BranchNameContributor.java
@@ -32,12 +32,13 @@
 import hudson.model.TaskListener;
 import java.io.IOException;
 import java.util.Date;
-import jenkins.scm.api.SCMHeadOrigin;
 import jenkins.scm.api.SCMHead;
+import jenkins.scm.api.SCMHeadOrigin;
 import jenkins.scm.api.metadata.ContributorMetadataAction;
 import jenkins.scm.api.metadata.ObjectMetadataAction;
 import jenkins.scm.api.mixin.ChangeRequestSCMHead;
 import jenkins.scm.api.mixin.ChangeRequestSCMHead2;
+import jenkins.scm.api.mixin.ChangeRequestSCMHead3;
 import jenkins.scm.api.mixin.TagSCMHead;
 
 /**
@@ -68,6 +69,9 @@ public void buildEnvironmentFor(Job j, EnvVars envs, TaskListener listener) thro
                     if (head instanceof ChangeRequestSCMHead2) {
                         envs.putIfNotNull("CHANGE_BRANCH", ((ChangeRequestSCMHead2) head).getOriginName());
                     }
+                    if (head instanceof ChangeRequestSCMHead3) {
+                        envs.putIfNotNull("CHANGE_BRANCH_COMMIT_ID", ((ChangeRequestSCMHead3) head).getSourceCommitId());
+                    }
                     SCMHeadOrigin origin = head.getOrigin();
                     if (origin instanceof SCMHeadOrigin.Fork) {
                         envs.putIfNotNull("CHANGE_FORK", ((SCMHeadOrigin.Fork) origin).getName());
diff --git a/src/test/java/jenkins/branch/BranchNameContributorTest.java b/src/test/java/jenkins/branch/BranchNameContributorTest.java
index 7c3855fe..5a5f15d0 100644
--- a/src/test/java/jenkins/branch/BranchNameContributorTest.java
+++ b/src/test/java/jenkins/branch/BranchNameContributorTest.java
@@ -122,6 +122,7 @@ public void buildEnvironmentFor() throws Exception {
                     is("CHANGE_TITLE"),
                     is("CHANGE_URL"),
                     is("CHANGE_BRANCH"),
+                    is("CHANGE_BRANCH_COMMIT_ID"),
                     is("CHANGE_AUTHOR"),
                     is("CHANGE_AUTHOR_EMAIL"),
                     is("CHANGE_AUTHOR_DISPLAY_NAME")
@@ -130,6 +131,7 @@ public void buildEnvironmentFor() throws Exception {
             assertThat(env.get("CHANGE_ID"), is(cr1Num.toString()));
             assertThat(env.get("CHANGE_TARGET"), is("master"));
             assertThat(env.get("CHANGE_BRANCH"), is("CR-" + cr1Num));
+            assertThat(env.get("CHANGE_BRANCH_COMMIT_ID"), is("sha" + cr1Num));
             assertThat(env.get("CHANGE_TITLE"), is("Change request #" + cr1Num));
             assertThat(env.get("CHANGE_URL"), is("http://changes.example.com/" + cr1Num));
             assertThat(env.get("CHANGE_AUTHOR"), is("bob"));
@@ -145,6 +147,7 @@ public void buildEnvironmentFor() throws Exception {
                     is("CHANGE_TITLE"),
                     is("CHANGE_URL"),
                     is("CHANGE_BRANCH"),
+                    is("CHANGE_BRANCH_COMMIT_ID"),
                     is("CHANGE_FORK"),
                     is("CHANGE_AUTHOR"),
                     is("CHANGE_AUTHOR_EMAIL"),
@@ -154,6 +157,7 @@ public void buildEnvironmentFor() throws Exception {
             assertThat(env.get("CHANGE_ID"), is(cr2Num.toString()));
             assertThat(env.get("CHANGE_TARGET"), is("master"));
             assertThat(env.get("CHANGE_BRANCH"), is("CR-" + cr2Num));
+            assertThat(env.get("CHANGE_BRANCH_COMMIT_ID"), is("sha" + cr2Num));
             assertThat(env.get("CHANGE_FORK"), is("fork"));
             assertThat(env.get("CHANGE_TITLE"), is("Change request #" + cr2Num));
             assertThat(env.get("CHANGE_URL"), is("http://changes.example.com/" + cr2Num));