Set pyenv branch.

Author: 0mdc

.circleci/config.yml

@@ -374,7 +374,7 @@ jobs:
       - run:
           name: pip install
           command: |
-            cd /opt/circleci/.pyenv/plugins/python-build/../.. && git pull && cd -
+            cd /opt/circleci/.pyenv/plugins/python-build/../.. && git fetch --tags && git checkout v2.3.15 && cd -
             pyenv install 3.9.16
             pyenv global 3.9.16
             python3 -m pip install -U pip