$ git clone -n https://src.fedoraproject.org/rpms/R-prettydoc.git /var/lib/mock/f37-build-side-32-misc-devel-335979-15450/root/chroot_tmpdir/scmroot/R-prettydoc
Cloning into '/var/lib/mock/f37-build-side-32-misc-devel-335979-15450/root/chroot_tmpdir/scmroot/R-prettydoc'...
$ git reset --hard bb41a4b419c0a1fe48d90812203abcf5a8e11b7a
HEAD is now at bb41a4b do not build vignettes