1 files changed, 11 insertions, 0 deletions
diff --git a/src/git-source-provider.ts b/src/git-source-provider.ts
index 89c16b5..25fba04 100644
--- a/src/git-source-provider.ts
+++ b/src/git-source-provider.ts
@@ -19,6 +19,17 @@ export async function getSource(settings: IGitSourceSettings): Promise<void> {
   )
   const repositoryUrl = urlHelper.getFetchUrl(settings)
 
+  // Determine the default branch
+  if (!settings.ref && !settings.commit) {
+    core.startGroup('Determining the default branch')
+    settings.ref = await githubApiHelper.getDefaultBranch(
+      settings.authToken,
+      settings.repositoryOwner,
+      settings.repositoryName
+    )
+    core.endGroup()
+  }
+
   // Remove conflicting file path
   if (fsHelper.fileExistsSync(settings.repositoryPath)) {
     await io.rmRF(settings.repositoryPath)