diff --git a/Rakefile b/Rakefile
index 76087068b3..60354e706e 100644
--- a/Rakefile
+++ b/Rakefile
@@ -394,6 +394,8 @@ end
 task docker_test_perf: :docker_build_clang_release do
   sh "docker run #{docker_run_flags} " \
      "-e STATS_API_SECRET=#{(ENV['STATS_API_SECRET'] || '').inspect} " \
+     "-e GITHUB_SHA=#{(ENV['GITHUB_SHA'] || '').inspect} " \
+     "-e GITHUB_HEAD_REF=#{(ENV['GITHUB_HEAD_REF'] || '').inspect} " \
      '--rm ' \
      '--entrypoint rake ' \
      "natalie_clang_#{ruby_version_string}_release test_perf"
diff --git a/spec/support/test_perf.rb b/spec/support/test_perf.rb
index 31c3086a03..4bc4d0de52 100644
--- a/spec/support/test_perf.rb
+++ b/spec/support/test_perf.rb
@@ -25,8 +25,8 @@
 pp totals
 
 stats = {
-  commit: `git rev-parse HEAD`.strip,
-  branch: `git rev-parse --abbrev-ref HEAD`.strip,
+  commit: ENV.fetch('GITHUB_SHA'),
+  branch: ENV.fetch('GITHUB_HEAD_REF'),
   ir: totals
 }