$ git clone -n https://src.fedoraproject.org/rpms/R-rlang.git /var/lib/mock/f31-build-74188-31091/root/chroot_tmpdir/scmroot/R-rlang
Cloning into '/var/lib/mock/f31-build-74188-31091/root/chroot_tmpdir/scmroot/R-rlang'...
$ git reset --hard b760f0d56953d417e2d2e0ef003581780796eba6
HEAD is now at b760f0d - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild