Install branch from a package
Arguments
- package
one of the core package name (default "pipapi")
- branch
valid branch name (default "PROD")
- force
logical: when TRUE, bypasses SHA pinning and the idempotency check, installing the live branch HEAD (`@<branch>`) instead. Intended for developers. Default FALSE.
- sha
character: optional commit SHA to install at. When supplied it overrides the resolved branch HEAD SHA. When NULL (default) and `force = FALSE`, the branch HEAD SHA is resolved and pinned.