$ git clone -n https://src.fedoraproject.org/rpms/R-xopen.git /var/lib/mock/f37-build-side-32-misc-devel-303048-14819/root/chroot_tmpdir/scmroot/R-xopen
Cloning into '/var/lib/mock/f37-build-side-32-misc-devel-303048-14819/root/chroot_tmpdir/scmroot/R-xopen'...
$ git reset --hard 6c7f9c3cf50448baa72a4a967041c27c65c5c3c8
HEAD is now at 6c7f9c3 rebuild for R 4.2.1