Fix gitaly setup running always for specs setup

Since we switched to shas in GITALY_SERVER_VERSION, it no longer matches
the VERSION in gitaly. As we cannot update VERSION as that is in another
project, we match GITALY_SERVER_VERSION against checked out git sha
instead, in order to determine if we need to run gitaly setup again

spec/support/helpers/test_env.rb

@@ -6,6 +6,8 @@ module TestEnv
 
   ComponentFailedToInstallError = Class.new(StandardError)
 
+  SHA_REGEX = /\A[0-9a-f]{5,40}\z/i.freeze
+
   # When developing the seed repository, comment out the branch you will modify.
   BRANCH_SHA = {
     'signed-commits'                     => '6101e87',
@@ -508,6 +510,8 @@ module TestEnv
     # Allow local overrides of the component for tests during development
     return false if Rails.env.test? && File.symlink?(component_folder)
 
+    return false if component_matches_git_sha?(component_folder, expected_version)
+
     version = File.read(File.join(component_folder, 'VERSION')).strip
 
     # Notice that this will always yield true when using branch versions
@@ -517,6 +521,16 @@ module TestEnv
   rescue Errno::ENOENT
     true
   end
+
+  def component_matches_git_sha?(component_folder, expected_version)
+    # Not a git SHA, so return early
+    return false unless expected_version =~ SHA_REGEX
+
+    sha, exit_status = Gitlab::Popen.popen(%W(#{Gitlab.config.git.bin_path} rev-parse HEAD), component_folder)
+    return false if exit_status != 0
+
+    expected_version == sha.chomp
+  end
 end
 
 require_relative('../../../ee/spec/support/helpers/ee/test_env') if Gitlab.ee?