Testing with r56663, the make-snapshot fails with message:
$ tool/make-snapshot -packages=xz tmp
/builddir/ruby/tool/vcs.rb:123:in `realpath': no implicit conversion of URI::HTTP into String (TypeError)
from /builddir/ruby/tool/vcs.rb:123:in `initialize'
from tool/make-snapshot:416:in `new'
from tool/make-snapshot:416:in `<main>'
It does not work since r56638, although the error was different initially.
tool/vcs.rb (VCS::GIT.cmd_args): add chdir option to arguments
for IO.popen if srcdir is a local path. unless -srcdir command
line option is given, srcdir is the default URL. [ruby-core:78036] [Bug #12908]