Summary:
Unfortunately we can't just use `git.rev` in manifests to specify branches as we clone using `--depth`. This means `rev-parse` on a remote branch name will fail.
This diff adds `git.branch` which allows us to be explicit when we want a branch and so check this out in the first place. By doing this future uses of `rev-parse` will also understand the branch name.
Reviewed By: martindemello
Differential Revision: D79660472
fbshipit-source-id: 6b04158bdd72c28864322be28d88ee4e41f54bc8
Summary: There are probably some other rules too, although this is the only one I know of.
Reviewed By: martindemello
Differential Revision: D79474227
fbshipit-source-id: 175f266cb43f671da241e2d2ca289328b9e413d0
