I’ve a foggy memory of Apple doing this. Code they used came back altered in a bulk that was hard to get into upstream again. A lot of discussion was going on about this practice but I don’t recall the outcome.
A question to the void. Are you entitled to get the source history of open source projects? Lots of Open Source licences give the consumer of software the right to a copy of the source code. For example, GPLv3 says that distributors of software have to: give anyone who possesses the object code … ...