$ git clone -n https://src.fedoraproject.org/rpms/chntpw.git /var/lib/mock/f31-build-56908-28271/root/chroot_tmpdir/scmroot/chntpw
Cloning into '/var/lib/mock/f31-build-56908-28271/root/chroot_tmpdir/scmroot/chntpw'...
$ git reset --hard 7fea2dfcbd24adc56c91fb0fd6bfa8f75c5f2ebe
HEAD is now at 7fea2df Add fix for rhbz# 1645886.  Thanks Oleg Samarin.