$ git clone -n https://src.fedoraproject.org/rpms/ntp-refclock.git /var/lib/mock/f33-build-135712-41784/root/chroot_tmpdir/scmroot/ntp-refclock
Cloning into '/var/lib/mock/f33-build-135712-41784/root/chroot_tmpdir/scmroot/ntp-refclock'...
$ git reset --hard 51691f71ed33a7ace35ce035a629888463cb6dc9
HEAD is now at 51691f7 0.3-1