$ git clone -n https://src.fedoraproject.org/rpms/R-readr.git /var/lib/mock/f37-build-642053-72056/root/chroot_tmpdir/scmroot/R-readr
Cloning into '/var/lib/mock/f37-build-642053-72056/root/chroot_tmpdir/scmroot/R-readr'...
$ git reset --hard 436b978cd417fd1f25ee58ea0b76900927bedb0c
HEAD is now at 436b978 rebuild for R 4.2.1