https://www.gnu.org/software/hurd/microkernel/mach/gnumach/building.html says to do: paul@jacko:~/mymach$ LANG=C git clone http://git.savannah.gnu.org/cgit/hurd/gnumach.git/ Cloning into 'gnumach'... fatal: repository 'http://git.savannah.gnu.org/cgit/hurd/gnumach.git/' not found paul@jacko:~/mymach$
But the following works: git clone git://git.savannah.gnu.org/hurd/gnumach.git/