$ git clone -n https://src.fedoraproject.org/rpms/extlinux-bootloader.git /var/lib/mock/f29-build-6849-1687/root/thebuilddir/tmp/scmroot/extlinux-bootloader
Cloning into '/var/lib/mock/f29-build-6849-1687/root/thebuilddir/tmp/scmroot/extlinux-bootloader'...
$ git reset --hard cad0a46e09ac206884c8fbb4b18990a29a729f9a
HEAD is now at cad0a46 - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild