> ## Documentation Index > Fetch the complete documentation index at: https://docs.domino.ai/llms.txt > Use this file to discover all available pages before exploring further. # Update the default git reference of a repository in a project > Set the default git reference Domino uses for the project's main repository or for one of its imported repositories. Runs and workspaces started after the update read the repository at this reference. Required permissions: `Edit` ## OpenAPI ````yaml /api-specs/cloud/public-api.json put /api/projects/v1/projects/{projectId}/repositories/{repositoryId}/default-ref openapi: 3.0.3 info: title: Domino Public API description: Reference for Domino's public REST API endpoints. version: 6.4.0 x-catalog-key: nucleus servers: - url: https://mycluster.domino.tech description: >- Replace 'mycluster.domino.tech' with your Domino cluster hostname. For Domino Cloud customers, that is `your-subdomain`.domino.tech (e.g., acme.domino.tech). For self-hosted deployments, it is the hostname you reach the Domino UI at. security: [] tags: - name: Projects - name: Project templates - name: Workspaces - name: Jobs - name: HPC Jobs - name: Environments - name: Hardware Tiers - name: Datasets - name: Data Sources - name: GenAI - name: AI Systems - name: Apps - name: App versions - name: App instances - name: Model APIs - name: Registered models - name: Model deployment - name: Extensions - name: Cost and billing - name: Users and organizations - name: Service accounts - name: Personal Access Tokens - name: Personal Access Tokens (admin) - name: Audit Trail - name: Custom metrics - name: PPM - name: Model Monitoring models - name: Model Monitoring drift and quality - name: Model Monitoring settings - name: Model Monitoring authentication - name: Governance bundles - name: Governance policies - name: Governance evidence and results - name: Governance operations - name: NetApp Volumes - name: NetApp Volumes snapshots - name: NetApp Volumes filesystems - name: NetApp Volumes transfers - name: Tags - name: Properties externalDocs: description: OpenAPI url: https://swagger.io/resources/open-api/ paths: /api/projects/v1/projects/{projectId}/repositories/{repositoryId}/default-ref: put: tags: - Projects summary: Update the default git reference of a repository in a project description: >- Set the default git reference Domino uses for the project's main repository or for one of its imported repositories. Runs and workspaces started after the update read the repository at this reference. Required permissions: `Edit` operationId: updateRepositoryDefaultRef parameters: - description: ID of the project the repository belongs to in: path name: projectId required: true schema: type: string - description: >- ID of the repository to update. Use `_` to refer to the project's main repository. in: path name: repositoryId required: true schema: type: string requestBody: content: application/json: schema: $ref: '#/components/schemas/ProjectRepositoryReferenceV1' description: The new default git reference required: true responses: '200': content: application/json: schema: $ref: '#/components/schemas/ProjectRepositoryReferenceEnvelopeV1' description: Success '400': $ref: '#/components/responses/400' '401': $ref: '#/components/responses/401' '403': $ref: '#/components/responses/403' '404': $ref: '#/components/responses/404' '500': $ref: '#/components/responses/500' security: - DominoApiKey: [] - BearerAuthentication: [] components: schemas: ProjectRepositoryReferenceV1: properties: refType: $ref: '#/components/schemas/GitReferenceTypeV1' value: type: string required: - refType type: object ProjectRepositoryReferenceEnvelopeV1: properties: defaultRef: $ref: '#/components/schemas/ProjectRepositoryReferenceV1' metadata: $ref: '#/components/schemas/MetadataV1' required: - defaultRef - metadata type: object GitReferenceTypeV1: enum: - head - branch - tag - commit type: string MetadataV1: properties: notices: description: Notices relating to the request items: type: string type: array requestId: type: string required: - requestId - notices type: object ErrorV1: properties: code: description: Machine-readable error code. example: NOT_FOUND type: string message: description: Human-readable description of the error. example: The requested HPC Job could not be found. type: string required: - message type: object responses: '400': content: application/json: schema: properties: error: type: string type: object description: Bad Request '401': content: application/json: example: code: UNAUTHORIZED message: Authentication is required to access this resource. schema: $ref: '#/components/schemas/ErrorV1' description: Unauthorized - authentication is required or has failed. '403': content: application/json: example: code: FORBIDDEN message: You do not have permission to perform this action. schema: $ref: '#/components/schemas/ErrorV1' description: Forbidden - the caller lacks permission to perform this action. '404': content: application/json: schema: properties: error: type: string type: object description: Not Found '500': content: application/json: schema: properties: error: type: string type: object description: Internal Server Error securitySchemes: DominoApiKey: type: apiKey in: header name: X-Domino-Api-Key BearerAuthentication: type: apiKey name: Authorization in: header ```` ## Related topics - [Domino Cloud release notes](/release-notes/cloud-release.md) - [Domino File System Projects](/cloud/platform-capabilities/core-concepts/projects/dfs-projects.md) - [Add an imported git repository to this project](/api-reference/projects/add-an-imported-git-repository-to-this-project.md) - [Git-based Projects](/cloud/platform-capabilities/core-concepts/projects/git-based-projects.md)