failed to checkout kernel repo git://git.kernel.dk/linux-block on commit 3ecd20a9c77c632a5afe4e134781e1629936adab: failed to run ["git" "checkout" "3ecd20a9c77c632a5afe4e134781e1629936adab"]: exit status 128
fatal: reference is not a tree: 3ecd20a9c77c632a5afe4e134781e1629936adab