$ git clone -n https://src.fedoraproject.org/rpms/clang7.0.git /var/lib/mock/f31-build-113668-34410/root/chroot_tmpdir/scmroot/clang7.0
Cloning into '/var/lib/mock/f31-build-113668-34410/root/chroot_tmpdir/scmroot/clang7.0'...
$ git reset --hard 94c93e0bf63eae61639ffab2cc01f0b4c2bf16e0
HEAD is now at 94c93e0 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild