diff --git a/ci-job-validation.groovy b/ci-job-validation.groovy
index 7e7f062d3..6c861d637 100644
--- a/ci-job-validation.groovy
+++ b/ci-job-validation.groovy
@@ -3,6 +3,7 @@ def cico_retry_interval = 60
 def ci_git_repo = 'https://github.com/ceph/ceph-csi'
 def ci_git_branch = 'ci/centos'
 def ref = 'ci/centos'
+def base = ''
 
 node('cico-workspace') {
 	stage('checkout ci repository') {
@@ -32,8 +33,11 @@ node('cico-workspace') {
 			if (params.ghprbPullId != null) {
 				ref = "pull/${ghprbPullId}/head"
 			}
+			if (params.ghprbTargetBranch != null) {
+				base = "--base=${ghprbTargetBranch}"
+			}
 			sh 'scp -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no ./prepare.sh root@${CICO_NODE}:'
-			sh "ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no root@${CICO_NODE} ./prepare.sh --workdir=/opt/build/go/src/github.com/ceph/ceph-csi --gitrepo=${ci_git_repo} --ref=${ref}"
+			sh "ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no root@${CICO_NODE} ./prepare.sh --workdir=/opt/build/go/src/github.com/ceph/ceph-csi --gitrepo=${ci_git_repo} --ref=${ref} ${base}"
 		}
 		stage('test') {
 			sh 'ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no root@${CICO_NODE} "cd /opt/build/go/src/github.com/ceph/ceph-csi && make"'
diff --git a/prepare.sh b/prepare.sh
index 55ee64094..419456726 100755
--- a/prepare.sh
+++ b/prepare.sh
@@ -6,11 +6,13 @@ set -e -o pipefail
 gitrepo="https://github.com/ceph/ceph-csi"
 workdir="tip/"
 ref="master"
+base="master"
 
 ARGUMENT_LIST=(
     "ref"
     "workdir"
     "gitrepo"
+    "base"
 )
 
 opts=$(getopt \
@@ -38,6 +40,7 @@ while true; do
         echo "--ref                     specify the reference of pr"
         echo "--workdir                 specify the working directory"
         echo "--gitrepo                 specify the git repository"
+        echo "--base                    specify the base branch to checkout"
         echo " "
         echo "Sample Usage:"
         echo "./prepare.sh --gitrepo=https://github.com/example --workdir=/opt/build --ref=pull/123/head"
@@ -56,6 +59,10 @@ while true; do
         ref=${1}
         echo "${ref}"
         ;;
+    --base)
+        shift
+        base=${1}
+        ;;
     --)
         shift
         break
@@ -68,7 +75,7 @@ set -x
 
 yum -y install git podman
 
-git clone --depth=1 "${gitrepo}" "${workdir}"
+git clone --depth=1 --branch="${base}" "${gitrepo}" "${workdir}"
 cd "${workdir}"
-git fetch --depth=1 origin "${ref}:tip/${ref}"
+git fetch origin "${ref}:tip/${ref}"
 git checkout "tip/${ref}"