$ git clone -n https://src.fedoraproject.org/rpms/rubygem-posix-spawn.git /var/lib/mock/f31-build-52767-27742/root/chroot_tmpdir/scmroot/rubygem-posix-spawn
Cloning into '/var/lib/mock/f31-build-52767-27742/root/chroot_tmpdir/scmroot/rubygem-posix-spawn'...
$ git reset --hard 65953241d2693e29836c824b254c0cf67d1caca4
HEAD is now at 6595324 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild