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# instead of pull which does fetching and merging it to the current branch (which has diamond effects on commits nodes) you can use this.

# git fetch && git rebase remotename/branchname local_branchname

git fetch && git rebase origin/sprint1 sprint1

#update your local copy of remote repository by using fetch then rebase your localbranch to the remote repository copy (which is origin/sprint1) then checkout the local_branch which is sprint