The system time on the server looks good - and podman version is good. Looks like maybe the build server or container that made the buildah binary glitched because the RPM has the correct date/time:
[root@hyperion ~]# buildah version
Version: 1.5
Go Version: go1.11.2
Image Spec: 1.0.0
Runtime Spec: 1.0.0
CNI Spec: 0.4.0
libcni Version:
Git Commit:
Built: Wed Dec 31 18:00:00 1969
OS/Arch: linux/amd64
[root@hyperion ~]# podman version
Version: 1.0.0
Go Version: go1.11.4
Git Commit: "49780a1cf10d572edc4e1ea3b8a8429ce391d47d"
Built: Mon Jan 14 14:38:17 2019
OS/Arch: linux/amd64
[root@hyperion ~]# date
Fri Jan 25 10:51:24 CST 2019
[root@hyperion ~]# rpm -qi buildah
Name : buildah
Version : 1.5
Release : 1.gite94b4f9.fc29
Architecture: x86_64
Install Date: Wed 12 Dec 2018 10:59:22 AM CST
Group : Unspecified
Size : 20724445
License : ASL 2.0
Signature : RSA/SHA256, Fri 23 Nov 2018 06:38:16 AM CST, Key ID a20aa56b429476b4
Source RPM : buildah-1.5-1.gite94b4f9.fc29.src.rpm
Build Date : Thu 22 Nov 2018 10:20:50 AM CST
Build Host : buildvm-25.phx2.fedoraproject.org
Relocations : (not relocatable)
Packager : Fedora Project
Vendor : Fedora Project
URL : https://github.com/containers/buildah
Bug URL : https://bugz.fedoraproject.org/buildah
Summary : A command line tool used for creating OCI Images