diff --git a/githttpxfer/git.go b/githttpxfer/git.go
index ab3461a..de667f9 100644
--- a/githttpxfer/git.go
+++ b/githttpxfer/git.go
@@ -6,6 +6,7 @@ import (
 	"os"
 	"os/exec"
 	"path"
+	"syscall"
 )
 
 func newGit(rootPath string, binPath string, uploadPack bool, receivePack bool) *git {
@@ -49,6 +50,7 @@ func (g *git) Exists(repoPath string) bool {
 func (g *git) GitCommand(repoPath string, args ...string) *exec.Cmd {
 	command := exec.Command(g.binPath, args...)
 	command.Dir = g.GetAbsolutePath(repoPath)
+	command.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
 	return command
 }
 
diff --git a/githttpxfer/githttpxfer.go b/githttpxfer/githttpxfer.go
index b031b7b..6572715 100644
--- a/githttpxfer/githttpxfer.go
+++ b/githttpxfer/githttpxfer.go
@@ -266,6 +266,7 @@ func (ghx *GitHTTPXfer) serviceRPC(ctx Context, rpc string) {
 	args := []string{rpc, "--stateless-rpc", "."}
 	cmd := ghx.Git.GitCommand(repoPath, args...)
 	cmd.Env = ctx.Env()
+	defer cleanUpProcessGroup(cmd)
 
 	stdin, err := cmd.StdinPipe()
 	if err != nil {
@@ -283,7 +284,8 @@ func (ghx *GitHTTPXfer) serviceRPC(ctx Context, rpc string) {
 	}
 	defer stdout.Close()
 
-	if err = cmd.Start(); err != nil {
+	err = cmd.Start()
+	if err != nil {
 		ghx.logger.Error("failed to starts the specified command. ", err.Error())
 		RenderInternalServerError(res.Writer)
 		return
diff --git a/githttpxfer/support.go b/githttpxfer/support.go
index e987b74..28fd678 100644
--- a/githttpxfer/support.go
+++ b/githttpxfer/support.go
@@ -2,7 +2,9 @@ package githttpxfer
 
 import (
 	"net/http"
+	"os/exec"
 	"strings"
+	"syscall"
 )
 
 func getServiceType(req *http.Request) string {
@@ -12,3 +14,13 @@ func getServiceType(req *http.Request) string {
 	}
 	return strings.Replace(serviceType, "git-", "", 1)
 }
+
+func cleanUpProcessGroup(cmd *exec.Cmd) {
+	if cmd == nil {
+		return
+	}
+	if process := cmd.Process; process != nil && process.Pid > 0 {
+		syscall.Kill(-process.Pid, syscall.SIGTERM)
+	}
+	cmd.Wait()
+}