refusing merge unrelated histories code example

Example 1: fatal: refusing to merge unrelated histories

git pull origin master --allow-unrelated-histories

Example 2: refusing to merge unrelated histories

git pull origin master --allow-unrelated-histories

Example 3: git unrelated histories

git pull origin branchname --allow-unrelated-histories

Example 4: git unrelated histories

git merge upstream/master --allow-unrelated-histories