diff --git a/shared/build/build_test.go b/shared/build/build_test.go
index 2367202a5..adaaf7d87 100644
--- a/shared/build/build_test.go
+++ b/shared/build/build_test.go
@@ -594,7 +594,7 @@ func TestWriteBuildScript(t *testing.T) {
 	f.WriteEnv("CI_PULL_REQUEST", "123")
 	f.WriteHost("127.0.0.1")
 	f.WriteFile("$HOME/.ssh/id_rsa", []byte("ssh-rsa AAA..."), 600)
-	f.WriteCmd("git clone --depth=0 --recursive git://github.com/drone/drone.git /var/cache/drone/github.com/drone/drone")
+	f.WriteCmd("git clone --depth=0 --recursive --branch=master git://github.com/drone/drone.git /var/cache/drone/github.com/drone/drone")
 	f.WriteCmd("git fetch origin +refs/pull/123/head:refs/remotes/origin/pr/123")
 	f.WriteCmd("git checkout -qf -b pr/123 origin/pr/123")
 
diff --git a/shared/build/repo/repo.go b/shared/build/repo/repo.go
index 65a14908a..fe1033062 100644
--- a/shared/build/repo/repo.go
+++ b/shared/build/repo/repo.go
@@ -120,7 +120,7 @@ func (r *Repo) Commands() []string {
 	cmds := []string{}
 	if len(r.PR) > 0 {
 		// If a specific PR is provided then we need to clone it.
-		cmds = append(cmds, fmt.Sprintf("git clone --depth=%d --recursive %s %s", r.Depth, r.Path, r.Dir))
+		cmds = append(cmds, fmt.Sprintf("git clone --depth=%d --recursive --branch=%s %s %s", r.Depth, branch, r.Path, r.Dir))
 		cmds = append(cmds, fmt.Sprintf("git fetch origin +refs/pull/%s/head:refs/remotes/origin/pr/%s", r.PR, r.PR))
 		cmds = append(cmds, fmt.Sprintf("git checkout -qf -b pr/%s origin/pr/%s", r.PR, r.PR))
 	} else {