The `ant_core_r0.9.0` branch of Megatron-LM is invalid.

**Describe the bug**
Cloning with `git clone -b ant_core_r0.9.0 git@code.alipay.com:Arc/Megatron-LM.git` fails—the `ant_core_r0.9.0` branch appears to be invalid. Could you provide a valid branch name or an updated repository URL?

**To Reproduce**
Steps to reproduce the unexpected case:
1. What kink of training? [e.g. FDDP]
2. The command using? [e.g. dlrover-run xxxxx xxxx]
3. When and where?
4. See error

**Logs or Screenshots**
Logs(necessary) or screenshots to help explain your problem.

**Expected behavior**
A clear and concise description of what you expected to happen.

**APP Info (please complete the following information):**
- DLRover: [e.g. 0.3.8]
- Torch [e.g. 2.1.2]

**ENV Info (please complete the following information):**
- Platform: [e.g. ubuntu xxx]
- Python: [e.g. 3.8.1]
- GRPC [e.g. 1.5.x]

**HARDWARE Info (please complete the following information):**
- Device: [e.g. GPU A100 / NPU Ascend 910]

**Additional context**
Add any other context about the problem here.