$ git clone -n https://src.fedoraproject.org/rpms/python-ntplib.git /var/lib/mock/f45-build-31745-655/root/chroot_tmpdir/scmroot/python-ntplib
Cloning into '/var/lib/mock/f45-build-31745-655/root/chroot_tmpdir/scmroot/python-ntplib'...
$ git fetch origin 4b6e723611be02f43af6b4e4f25955818eede6b4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-ntplib
 * [new ref]         4b6e723611be02f43af6b4e4f25955818eede6b4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4b6e723 Update to 0.4.0