To change last commit date
GIT_COMMITTER_DATE="`date -R -v-3d`" git commit --amend --no-edit --date "`date -R -v-3d`" && git push
To change last commit date
GIT_COMMITTER_DATE="`date -R -v-3d`" git commit --amend --no-edit --date "`date -R -v-3d`" && git push
Thank you!