$ git clone -n https://src.fedoraproject.org/rpms/R-utf8.git /var/lib/mock/f38-build-723861-99307/root/chroot_tmpdir/scmroot/R-utf8
Cloning into '/var/lib/mock/f38-build-723861-99307/root/chroot_tmpdir/scmroot/R-utf8'...
$ git reset --hard d4cb34f43cfa7fe40b9da59153a67f2f28f35b30
HEAD is now at d4cb34f Ignore vignettes