how to check from which branch a branch is created code example

Example 1: find the parent branch of a git branch

git log --first-parent

Example 2: git check who created branch

git for-each-ref --format='%(color:cyan)%(authordate:format:%m/%d/%Y %I:%M %p)    %(align:25,left)%(color:yellow)%(authorname)%(end) %(color:reset)%(refname:strip=3)' --sort=authordate refs/remotes

Example 3: find out a branch a parent branch git

git show-branch -a | grep '\*' | grep -v `git rev-parse --abbrev-ref HEAD` | head -n1 | sed 's/.*\[\(.*\)\].*/\1/' | sed 's/[\^~].*//'