$ git clone -n https://src.fedoraproject.org/rpms/R-units.git /var/lib/mock/f37-build-641845-72037/root/chroot_tmpdir/scmroot/R-units
Cloning into '/var/lib/mock/f37-build-641845-72037/root/chroot_tmpdir/scmroot/R-units'...
$ git reset --hard ec9ecf50550f0ba2a90421e367776f3f0e509755
HEAD is now at ec9ecf5 rebuild for R 4.2.1