syz-gce: speedup kernel checkout

Checkout only single branch with no history.

1 files changed, 6 insertions, 1 deletions

diff --git a/syz-gce/syz-gce.go b/syz-gce/syz-gce.go
index 80824d0d4..f52f6ac90 100644
--- a/syz-gce/syz-gce.go
+++ b/syz-gce/syz-gce.go
@@ -346,7 +346,12 @@ func (a *LocalBuildAction) Poll() (string, error) {
 		if err := os.MkdirAll(dir, 0700); err != nil {
 			return "", fmt.Errorf("failed to create repo dir: %v", err)
 		}
-		if _, err := runCmd("", "git", "clone", a.Repo, dir); err != nil {
+		cloneArgs := []string{"clone", a.Repo, "--single-branch", "--depth", "1"}
+		if a.Branch != "" {
+			cloneArgs = append(cloneArgs, "--branch", a.Branch)
+		}
+		cloneArgs = append(cloneArgs, dir)
+		if _, err := runCmd("", "git", cloneArgs...); err != nil {
 			return "", err
 		}
 		if _, err := runCmd(dir, "git", "pull"); err != nil {