yarn installでrefs/heads/xxxブランチがないって言われた時の対処法

なぜか急にyarn installやyarn addができなくなった。
→ yarn cache clearでcacheクリアしたらできるようになった。

yarn install/addができない

$ yarn install
yarn install v1.22.10
[1/4] 🔍  Resolving packages...
[2/4] 🚚  Fetching packages...
error Command failed.
Exit code: 1
Command: git
Arguments: pull
Directory: /Users/xxx/Library/Caches/Yarn/v6/.tmp/e435b7ca0cb96f2553222bc619c5b701
Output:
Your configuration specifies to merge with the ref 'refs/heads/ng-new'
from the remote, but no such ref was fetched.
info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.

$ yarn add bootstrap-icons
yarn add v1.22.10
[1/4] 🔍  Resolving packages...
[2/4] 🚚  Fetching packages...
error Command failed.
Exit code: 1
Command: git
Arguments: pull
Directory: /Users/xxx/Library/Caches/Yarn/v6/.tmp/e435b7ca0cb96f2553222bc619c5b701
Output:
Your configuration specifies to merge with the ref 'refs/heads/ng-new'
from the remote, but no such ref was fetched.
info Visit https://yarnpkg.com/en/docs/cli/add for documentation about this command.

remoteブランチを確認してみると確かにない

$ git ls-remote origin | grep ng-new
# なし

cacheクリアしてみる

$ yarn cache clean
yarn cache v1.22.10
success Cleared cache.
✨  Done in 30.85s.

yarn installできたー！！！

$ yarn install
yarn install v1.22.10
[1/4] 🔍  Resolving packages...
[2/4] 🚚  Fetching packages...
[3/4] 🔗  Linking dependencies...
[4/4] 🔨  Building fresh packages...
✨  Done in 35.10s.