$ git clone -n https://src.fedoraproject.org/rpms/R-promises.git /var/lib/mock/f31-build-50495-27412/root/chroot_tmpdir/scmroot/R-promises
Cloning into '/var/lib/mock/f31-build-50495-27412/root/chroot_tmpdir/scmroot/R-promises'...
$ git reset --hard cac56f508b5644fe63e4e3d4a9be2fb8aaa0dcae
HEAD is now at cac56f5 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild