diff --git a/README.md b/README.md
index cd96d86..0479b29 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,8 @@ This action can be used in other repositories' workflows to clone multiple repos
 **Inputs:**
 - **`repo-list`** (required): Space-separated list of repositories in `org/repo` format to clone
 - **`git-pat`** (optional): Git Personal Access Token for authentication
+- **`default-repo-ref`** (optional): Default Git reference to check out
+- **`pyproject-path`** (optional): Path to the pyproject.toml file
 
 **Example workflow:**
 
@@ -22,7 +24,8 @@ This action can be used in other repositories' workflows to clone multiple repos
   with:
     repo-list: "org/repo1 org/repo2"
     git-pat: ${{ secrets.GIT_PAT }}
-    default-repo-ref: "main"
+    default-repo-ref: main
+    pyproject-path: pyproject.toml
 ~~~
 
 ### Features
diff --git a/git-clone/action.yml b/git-clone/action.yml
index ea354a5..f0d4173 100644
--- a/git-clone/action.yml
+++ b/git-clone/action.yml
@@ -10,7 +10,11 @@ inputs:
     required: false
   default-repo-ref:
     description: 'Default Git reference to check out'
-    default: 'main'
+    default: ''
+    required: false
+  pyproject-path:
+    description: 'Path to the pyproject.toml file'
+    default: ''
     required: false
 runs:
   using: "composite"
@@ -22,5 +26,7 @@ runs:
       env:
         GIT_PAT: ${{ inputs.git-pat }}
         REPO_LIST: ${{ inputs.repo-list }}
+        DEFAULT_REPO_REF: ${{ inputs.default-repo-ref }}
+        PYPROJECT_PATH: ${{ inputs.pyproject-path }}
       run: |
-        uv run ${{ github.action_path }}/../scripts/git-clone-ref.py ${REPO_LIST}
+        uv run ${{ github.action_path }}/../scripts/git-clone-ref.py ${REPO_LIST} --default-repo-ref "${DEFAULT_REPO_REF}" --pyproject-path "${PYPROJECT_PATH}"
diff --git a/scripts/git-clone-ref.py b/scripts/git-clone-ref.py
index ea3eeb2..7032df4 100755
--- a/scripts/git-clone-ref.py
+++ b/scripts/git-clone-ref.py
@@ -6,11 +6,13 @@
 # ]
 # ///
 
-import os
 import logging
+import os
 import shutil
+from typing import Annotated
 
 import git
+import tomllib
 import typer
 
 logger = logging.getLogger(__name__)
@@ -24,7 +26,8 @@ def git_clone_repo(
     repo_ref: str,
     multi_options: tuple[str, ...] = ("--depth=1", "--recurse-submodules"),
 ) -> str:
-    multi_options += (f"--branch {repo_ref}",)
+    if repo_ref:
+        multi_options += (f"--branch {repo_ref}",)
 
     if os.path.exists(repo_path):
         logger.info(f"removing {repo_path!r}")
@@ -44,7 +47,10 @@ def git_clone_repos(
     git_pat: str,
     default_repo_ref: str,
 ) -> None:
-    for repo_path in paths:
+    if not paths:
+        logger.warning("No repository to clone.")
+
+    for repo_path in set(paths):
         repo_name = os.path.basename(repo_path)
         repo_org = os.path.basename(os.path.dirname(repo_path))
         git_pat_org = os.getenv(f"GIT_PAT_{repo_org.upper()}", git_pat)
@@ -68,17 +74,32 @@ def git_clone_repos(
 
 @app.command()
 def main(
-    github_repos: list[str] = typer.Argument(..., help="GitHub repositories to clone"),
-    git_pat: str = typer.Option(
-        default="", envvar="GIT_PAT", help="GitHub Personal Access Token"
-    ),
-    default_repo_ref: str = typer.Option(
-        default="main", help="Default Git reference to check out"
-    ),
+    repo_list: Annotated[
+        list[str],
+        typer.Argument(help="GitHub repositories to clone."),
+    ] = [],
+    git_pat: Annotated[
+        str,
+        typer.Option(envvar="GIT_PAT", help="GitHub Personal Access Token."),
+    ] = "",
+    default_repo_ref: Annotated[
+        str,
+        typer.Option(help="Default Git reference to check out."),
+    ] = "",
+    pyproject_path: Annotated[
+        str | None,
+        typer.Option(help="Path to the pyproject.toml file."),
+    ] = None,
 ):
+    if pyproject_path:
+        with open(pyproject_path, "rb") as fp:
+            pyproject = tomllib.load(fp)
+        config = pyproject.get("tool", {}).get("git-clone", {})
+        repo_list.extend(config.get("repo-list", []))
+
     logging.basicConfig(level=logging.INFO)
     git_clone_repos(
-        github_repos,
+        repo_list,
         "https://{credentials}github.com/{repo_org}/{repo_name}.git",
         git_pat,
         default_repo_ref,