$ git clone -n https://src.fedoraproject.org/rpms/R-purrr.git /var/lib/mock/f37-build-641812-72037/root/chroot_tmpdir/scmroot/R-purrr
Cloning into '/var/lib/mock/f37-build-641812-72037/root/chroot_tmpdir/scmroot/R-purrr'...
$ git reset --hard 5b526f3fd4e1dca3e934c5475fb13adc61112ec8
HEAD is now at 5b526f3 Disable bootstrap