$ git clone -n https://src.fedoraproject.org/rpms/R-Cairo.git /var/lib/mock/f31-build-73660-31011/root/chroot_tmpdir/scmroot/R-Cairo
Cloning into '/var/lib/mock/f31-build-73660-31011/root/chroot_tmpdir/scmroot/R-Cairo'...
$ git reset --hard 6cf5bcef5e15b58499e3fb3326f04da0a11cd04e
HEAD is now at 6cf5bce - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild