$ git clone -n https://src.fedoraproject.org/rpms/R-Rmpfr.git /var/lib/mock/f32-build-118192-35408/root/chroot_tmpdir/scmroot/R-Rmpfr
Cloning into '/var/lib/mock/f32-build-118192-35408/root/chroot_tmpdir/scmroot/R-Rmpfr'...
$ git reset --hard b2216ac76c3ca8fcd88ff43a423b4b735b6aa0f0
HEAD is now at b2216ac Rebuild for mpfr 4