diff --git a/README.md b/README.md
index 8e1c6ff..6f8bbfa 100644
--- a/README.md
+++ b/README.md
@@ -128,7 +128,7 @@ git config --get pullrequest.userlogin  # returns the github user login for the
 
  * `.git/user_login`: the user login of the pull request author
 
- * `.git/branch_sha`: the latest commit hash of the branch associated with the pull request
+ * `.git/head_sha`: the latest commit hash of the branch associated with the pull request
 
 #### Parameters
 
diff --git a/assets/lib/commands/in.rb b/assets/lib/commands/in.rb
index b066a39..ac8ffea 100755
--- a/assets/lib/commands/in.rb
+++ b/assets/lib/commands/in.rb
@@ -31,7 +31,7 @@ def output
           echo "#{pr['head']['ref']}" > branch
           echo "#{pr['base']['ref']}" > base_branch
           echo "#{pr['base']['user']['login']}" > userlogin
-          echo "#{pr['head']['sha']}" > branch_sha
+          echo "#{pr['head']['sha']}" > head_sha
         BASH
       end
 
diff --git a/spec/commands/in_spec.rb b/spec/commands/in_spec.rb
index 5cd535b..960c999 100644
--- a/spec/commands/in_spec.rb
+++ b/spec/commands/in_spec.rb
@@ -114,7 +114,7 @@ def dest_dir
       end
 
       it 'creates a file that includes the hash of the branch  in the .git folder' do
-        value = File.read(File.join(dest_dir,'.git','branch_sha')).strip()
+        value = File.read(File.join(dest_dir,'.git','head_sha')).strip()
         expect(value).to eq 'hash'
       end