Some methods to set environment varialbes for single command, instead of this: ```go os.Setenv("XB_AUTHOR_DATE", dateStr) os.Setenv("XB_COMMITTER_DATE", dateStr) ``` Maybe in old shell way: ```bash XB_AUTHOR_DATE="2021-04-05" XB_COMMITTER_DATE="2021-04-05" xb_push xxxx ```