diff --git a/bin/cml/ci.js b/bin/cml/ci.js
index d50e0bc25..baae74343 100644
--- a/bin/cml/ci.js
+++ b/bin/cml/ci.js
@@ -14,6 +14,11 @@ exports.handler = async (opts) => {
 exports.builder = (yargs) =>
   yargs.env('CML_CI').options(
     kebabcaseKeys({
+      unshallow: {
+        type: 'boolean',
+        description:
+          'Fetch as much as possible, converting a shallow repository to a complete one.'
+      },
       userEmail: {
         type: 'string',
         default: GIT_USER_EMAIL,
diff --git a/bin/cml/ci.test.js b/bin/cml/ci.test.js
index e4ddca28c..cf29bcc26 100644
--- a/bin/cml/ci.test.js
+++ b/bin/cml/ci.test.js
@@ -14,6 +14,8 @@ describe('CML e2e', () => {
         --version     Show version number                                    [boolean]
         --log         Maximum log level
                 [string] [choices: \\"error\\", \\"warn\\", \\"info\\", \\"debug\\"] [default: \\"info\\"]
+        --unshallow   Fetch as much as possible, converting a shallow repository to a
+                      complete one.                                          [boolean]
         --user-email  Set Git user email.    [string] [default: \\"olivaw@iterative.ai\\"]
         --user-name   Set Git user name.             [string] [default: \\"Olivaw[bot]\\"]
         --repo        Set repository to be used. If unspecified, inferred from the
diff --git a/src/cml.js b/src/cml.js
index a38d73717..07f0e5b0c 100755
--- a/src/cml.js
+++ b/src/cml.js
@@ -330,11 +330,19 @@ class CML {
   }
 
   async ci(opts = {}) {
-    const { userEmail = GIT_USER_EMAIL, userName = GIT_USER_NAME } = opts;
+    const {
+      unshallow = false,
+      userEmail = GIT_USER_EMAIL,
+      userName = GIT_USER_NAME
+    } = opts;
 
     const driver = getDriver(this);
-    const command = await driver.updateGitConfig({ userName, userEmail });
-    await exec(command);
+    await exec(await driver.updateGitConfig({ userName, userEmail }));
+    if (unshallow) {
+      if ((await exec('git rev-parse --is-shallow-repository')) === 'true') {
+        await exec('git fetch --unshallow');
+      }
+    }
     await exec('git fetch --all');
   }