My company is interested in contributing to the project. They notice however that the LLVM project does not have a Copyright notice file in the repo, and the documentation says that Copyright assignments are not collected (one can figure it out inspecting the git history).
As such, my company is concerned about not being able to fullfil the Redistribution requirements of the Apache 2.0 license, since Copyright information is not available in a distributable format. E.g. if one redistributes a tarball of the repo, the git information is lost and so is the Copyright holder information (which is only available in the repository).
Therefore we’d like to know how the Redistribution requirements of the Apache license are satisfied in that case, so that we can contribute in a compliant way.