$ git clone -n https://src.fedoraproject.org/rpms/lua-rex.git /var/lib/mock/f31-build-48955-27213/root/chroot_tmpdir/scmroot/lua-rex
Cloning into '/var/lib/mock/f31-build-48955-27213/root/chroot_tmpdir/scmroot/lua-rex'...
$ git reset --hard 70cffb9702b48caa4e4e4ec52f2e4a5f04e7e15d
HEAD is now at 70cffb9 add BuildRequires: gcc