diff --git a/src/commands/fetch.js b/src/commands/fetch.js
index 8a4429f..fceb039 100644
--- a/src/commands/fetch.js
+++ b/src/commands/fetch.js
@@ -78,6 +78,7 @@ function fetch(repo, options) {
   const argsString = R.join(' ', args);
   return core.fetch(argsString, { cwd: repo.workdir(), shell: true }, callback)
     .then(({ stdout }) => {
+      const response = generateResponse();
       response.raw = stdout;
       response.fetch = generateFetchStats(stdout);
 
@@ -88,7 +89,7 @@ function fetch(repo, options) {
       }
 
       return response;
-    }, errorCatchHandler(response));
+    }, errorCatchHandler);
 }
 
 export default fetch;
diff --git a/src/commands/pull.js b/src/commands/pull.js
index 5002584..8b13d58 100644
--- a/src/commands/pull.js
+++ b/src/commands/pull.js
@@ -77,6 +77,7 @@ function pull(repo, options) {
 
   return core.pull(argsString, { cwd: repo.workdir(), shell: true }, callback)
     .then(({ stdout }) => {
+      const response = generateResponse();
       response.raw = stdout;
       response.pull = generatePullStats(stdout);
 
@@ -87,7 +88,7 @@ function pull(repo, options) {
       }
 
       return response;
-    }, errorCatchHandler(response));
+    }, errorCatchHandler);
 }
 
 export default pull;
diff --git a/src/commands/version.js b/src/commands/version.js
index 78cb0a6..ba271ea 100644
--- a/src/commands/version.js
+++ b/src/commands/version.js
@@ -6,8 +6,8 @@ import {
 } from '../constants';
 import generateResponse from '../utils/generateResponse';
 
-const version = () => {
-  return core.version()
+const version = () =>
+  core.version()
     .then(({ stdout, stderr }) => {
       const response = generateResponse();
       response.raw = stdout;
diff --git a/src/utils/execHelper.js b/src/utils/execHelper.js
index 607cd1a..e6454d1 100644
--- a/src/utils/execHelper.js
+++ b/src/utils/execHelper.js
@@ -1,9 +1,9 @@
 import child from 'child_process';
 import R from 'ramda';
 
-const exec = (command, input, opts) => new Promise(
+const exec = (command, input, opts = {}) => new Promise(
   (resolve, reject) => {
-    const options = R.mergeDeepRight((opts || {}), { env: process.env });
+    const options = R.mergeDeepRight(opts, { env: process.env });
 
     if (process.platform !== 'win32' && !R.contains('/usr/local/bin', options.env.PATH)) {
       options.env.PATH = `${options.env.PATH}${':/usr/local/bin'}`;
diff --git a/test/tests/utils/execHelper.spec.js b/test/tests/utils/execHelper.spec.js
index 93c1716..5656759 100644
--- a/test/tests/utils/execHelper.spec.js
+++ b/test/tests/utils/execHelper.spec.js
@@ -40,7 +40,7 @@ describe('execHelper', () => {
         mockProcess
       } = this;
 
-      const promise = exec('test', '', { foo: 'bar' });
+      const promise = exec('test', '');
       execSpy.firstCall.args[2](null, 'some stdout', 'some stderr');
       return promise
         .then((result) => {