diff --git a/checkstyle-tester/diff.groovy b/checkstyle-tester/diff.groovy
index da4fcd26..a0dba27c 100644
--- a/checkstyle-tester/diff.groovy
+++ b/checkstyle-tester/diff.groovy
@@ -343,11 +343,11 @@ def getCommitSha(commitId, repoType, srcDestinationDir) {
     return sha.replace('\n', '')
 }
 
-def getCloneCmd(repoType, repoUrl, srcDestinationDir) {
+def getCloneCmd(repoType, repoUrl, srcDestinationDir, commitId) {
     def cloneCmd = ''
     switch (repoType) {
         case 'git':
-            cloneCmd = "git clone $repoUrl $srcDestinationDir"
+            cloneCmd = "git clone --depth 1 --branch $commitId $repoUrl $srcDestinationDir"
             break
         case 'hg':
             cloneCmd = "hg clone $repoUrl $srcDestinationDir"
@@ -361,7 +361,7 @@ def getCloneCmd(repoType, repoUrl, srcDestinationDir) {
 def cloneRepository(repoName, repoType, repoUrl, commitId, srcDir) {
     def srcDestinationDir = getOsSpecificPath("$srcDir", "$repoName")
     if (!Files.exists(Paths.get(srcDestinationDir))) {
-        def cloneCmd = getCloneCmd(repoType, repoUrl, srcDestinationDir)
+        def cloneCmd = getCloneCmd(repoType, repoUrl, srcDestinationDir, commitId)
         println "Cloning $repoType repository '$repoName' to $srcDestinationDir folder ..."
         executeCmdWithRetry(cloneCmd)
         println "Cloning $repoType repository '$repoName' - completed\n"