diff --git a/src/git.ts b/src/git.ts
index d1312b5..4b47977 100644
--- a/src/git.ts
+++ b/src/git.ts
@@ -36,6 +36,18 @@ export class GitBranchRef extends GitRef {}
 export class GitTagRef extends GitRef {}
 
 
+export const gitFetch = pipe(
+    SimpleGitService,
+
+    Effect.flatMap(git =>
+        Effect.tryPromise({
+            try: () => git.fetch(),
+            catch: mapSimpleGitErrors,
+        })
+    ),
+)
+
+
 export class GitRefNullNameError {}
 
 export const getGitRefName = pipe(
diff --git a/src/index.ts b/src/index.ts
index 00f6ec1..829b0fb 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -2,7 +2,7 @@ import { Console, Context, Effect, pipe } from "effect"
 import simpleGit from "simple-git"
 import { parseArgv } from "./argv"
 import { parseEnv } from "./env"
-import { SimpleGitService, getGitRef } from "./git"
+import { SimpleGitService, getGitRef, gitFetch } from "./git"
 import { DefaultMatcher, SemVerMatcher, generateDockerTagsFromGitRef } from "./matchers"
 import { writeDockerTagsFile } from "./tags"
 
@@ -19,7 +19,8 @@ const context = Context.empty().pipe(
 )
 
 const main = pipe(
-    getGitRef,
+    gitFetch,
+    Effect.flatMap(() => getGitRef),
 
     Effect.flatMap(ref => generateDockerTagsFromGitRef(ref, [
         new SemVerMatcher,