$ git clone -n https://src.fedoraproject.org/rpms/R-sys.git /var/lib/mock/f31-build-100000-33216/root/chroot_tmpdir/scmroot/R-sys
Cloning into '/var/lib/mock/f31-build-100000-33216/root/chroot_tmpdir/scmroot/R-sys'...
$ git reset --hard 9792680ace420de983267812822b8cb9b1f07ccb
HEAD is now at 9792680 Remove explicit dependencies provided by automatic dependency generator.