unable to merge unrelated branches 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: fatal: refusing to merge unrelated histories

git pull origin branchname --allow-unrelated-histories

Example 4: fatal: refusing to merge unrelated histories

git pull origin master --allow-unrelated-histories

Example 5: git refusing to merge unrelated histories on rebase

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