$ git clone -n https://src.fedoraproject.org/rpms/ntp-refclock.git /var/lib/mock/f31-build-48101-27014/root/chroot_tmpdir/scmroot/ntp-refclock
Cloning into '/var/lib/mock/f31-build-48101-27014/root/chroot_tmpdir/scmroot/ntp-refclock'...
$ git reset --hard 5a60871ef93dccbc88dbdc5b63ac066aa3c5b797
HEAD is now at 5a60871 0.2-5