$ git clone -n https://src.fedoraproject.org/rpms/libb64.git /var/lib/mock/f31-build-58258-28432/root/chroot_tmpdir/scmroot/libb64
Cloning into '/var/lib/mock/f31-build-58258-28432/root/chroot_tmpdir/scmroot/libb64'...
$ git reset --hard 1fa3e7bb6980b3863df2f9897596bf1bbb184824
HEAD is now at 1fa3e7b - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild