diff --git a/lib/db/build-index.js b/lib/db/build-index.js
index fc5072a..eb286a8 100644
--- a/lib/db/build-index.js
+++ b/lib/db/build-index.js
@@ -67,6 +67,9 @@ async function * loadProject (octokit, graphQL, project, config, _repo) {
     }
   }
 
+  // Check config for repoBranch
+  project.repoBranch = project.repoBranch ?? repo.branch
+
   let pkg
   try {
     pkg = await files.getPackageJson(project)
@@ -146,7 +149,7 @@ async function * loadProject (octokit, graphQL, project, config, _repo) {
   }
 
   try {
-    for await (const commit of github.getRepoCommits(graphQL, project.repoOwner, project.repoName)) {
+    for await (const commit of github.getRepoCommits(graphQL, project.repoOwner, project.repoName, project.repoBranch)) {
       yield projectDetail('COMMIT', project, commit)
     }
   } catch (e) {
diff --git a/lib/github.js b/lib/github.js
index 73f0ba0..9555af3 100644
--- a/lib/github.js
+++ b/lib/github.js
@@ -35,6 +35,9 @@ const repoQuerySnip = `{
     name
   }
   homepageUrl
+  defaultBranchRef {
+    name
+  }
 }`
 
 const issueQuerySnip = `pageInfo {
@@ -136,6 +139,7 @@ class Repo {
     this.license = repo.licenseInfo && (repo.licenseInfo.spdx_id || repo.licenseInfo.name)
     this.language = repo.primaryLanguage ? repo.primaryLanguage.name : repo.primaryLanguage
     this.homepage = repo.homepageUrl
+    this.branch = repo.defaultBranchRef.name
   }
 }
 
@@ -465,12 +469,12 @@ class Commit {
   }
 }
 
-async function getRemainingCommits (graphQL, owner, repo, cursor) {
+async function getRemainingCommits (graphQL, owner, repo, cursor, branch) {
   try {
     const resp = await graphQL({
-      query: `query ($org: String!, $repo: String!, $cursor: String!) {
+      query: `query ($org: String!, $repo: String!, $cursor: String!, $branch: String!) {
         repository(name: $repo, owner: $org) {
-          object(expression: "master") {
+          object(expression: $branch) {
             ... on Commit {
               history(first: 100, after: $cursor) {
                 nodes {
@@ -502,10 +506,11 @@ async function getRemainingCommits (graphQL, owner, repo, cursor) {
       `,
       org: owner,
       repo,
-      cursor
+      cursor,
+      branch
     })
     const { pageInfo, nodes } = resp.repository.object.history
-    const commits = !pageInfo.hasNextPage ? nodes : nodes.concat(await getRemainingCommits(graphQL, owner, repo, pageInfo.endCursor))
+    const commits = !pageInfo.hasNextPage ? nodes : nodes.concat(await getRemainingCommits(graphQL, owner, repo, pageInfo.endCursor, branch))
 
     return commits
   } catch (error) {
@@ -515,12 +520,12 @@ async function getRemainingCommits (graphQL, owner, repo, cursor) {
 }
 
 module.exports.getRepoCommits =
-async function * getRepoCommits (graphQL, owner, repo) {
+async function * getRepoCommits (graphQL, owner, repo, branch) {
   try {
     const resp = await graphQL({
-      query: `query ($org: String!, $repo: String!) {
+      query: `query ($org: String!, $repo: String!, $branch: String!) {
         repository(name: $repo, owner: $org) {
-          object(expression: "master") {
+          object(expression: $branch) {
             ... on Commit {
               history(first: 100) {
                 nodes {
@@ -551,10 +556,11 @@ async function * getRepoCommits (graphQL, owner, repo) {
       }
       `,
       org: owner,
-      repo
+      repo,
+      branch
     })
     const { pageInfo, nodes } = resp.repository.object.history
-    const commits = !pageInfo.hasNextPage ? nodes : nodes.concat(await getRemainingCommits(graphQL, owner, repo, pageInfo.endCursor))
+    const commits = !pageInfo.hasNextPage ? nodes : nodes.concat(await getRemainingCommits(graphQL, owner, repo, pageInfo.endCursor, branch))
 
     for (const c of commits) {
       yield new Commit(owner, repo, c)
diff --git a/lib/project.js b/lib/project.js
index b1f3352..7b0bacf 100644
--- a/lib/project.js
+++ b/lib/project.js
@@ -23,7 +23,7 @@ module.exports.Project = class Project {
     this.repo = repo
     this.repoOwner = repoOwner
     this.repoName = repoName
-    this.repoBranch = proj.repoBranch || 'HEAD'
+    this.repoBranch = proj.repoBranch
     this.repoDirectory = proj.repoDirectory || '/'
     this.packageName = null
   }