diff --git a/action.yml b/action.yml
index 941ec1d..2c1fb50 100644
--- a/action.yml
+++ b/action.yml
@@ -4,6 +4,12 @@ inputs:
   token:
     description: github token to clone / push with
     required: false
+  source:
+    description: The remote branch's commit_id when using `git push`.
+    required: false
+  origin:
+    description: The origin branch's commit_id when using `git push`.
+    required: false
 runs:
   using: 'node12'
   main: 'dist/index.js'
diff --git a/index.js b/index.js
index 64bdac2..0e1a311 100644
--- a/index.js
+++ b/index.js
@@ -2,10 +2,6 @@ const core = require('@actions/core');
 const exec = require('@actions/exec');
 const github = require('@actions/github');
 
-const ARGS = [
-    'run', '--all-files', '--show-diff-on-failure', '--color=always'
-];
-
 function addToken(url, token) {
     return url.replace(/^https:\/\//, `https://x-access-token:${token}@`)
 }
@@ -17,14 +13,33 @@ async function main() {
     });
 
     const token = core.getInput('token');
+    const source = core.getInput('source');
+    const origin = core.getInput('origin');
+
+    var args = [
+        'run', '--show-diff-on-failure', '--color=always'
+    ];
+
+    if (source) {
+        args.push('--source', source);
+    }
+    
+    if (origin) {
+        args.push('--origin', origin);
+    }
+
+    if (!!source && !!origin) {
+        args.push('--all-files');
+    }
+    
     const pr = github.context.payload.pull_request;
     const push = !!token && !!pr;
-    const ret = await exec.exec('pre-commit', ARGS, {ignoreReturnCode: push});
+    const ret = await exec.exec('pre-commit', args, {ignoreReturnCode: push});
     if (ret && push) {
         // actions do not run on pushes made by actions.
         // need to make absolute sure things are good before pushing
         // TODO: is there a better way around this limitation?
-        await exec.exec('pre-commit', ARGS);
+        await exec.exec('pre-commit', args);
 
         const diff = await exec.exec(
             'git', ['diff', '--quiet'], {ignoreReturnCode: true}