$ git clone -n https://src.fedoraproject.org/rpms/R-utf8.git /var/lib/mock/f37-build-643691-72135/root/chroot_tmpdir/scmroot/R-utf8
Cloning into '/var/lib/mock/f37-build-643691-72135/root/chroot_tmpdir/scmroot/R-utf8'...
$ git reset --hard 978ad7527219fdd4564ccdb13b8ffa0c166d3e6f
HEAD is now at 978ad75 Disable bootstrap