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POIn git, is there a simple way of introducing an unrelated branch to a repository?
 

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  1. POIn git, is there a simple way of introducing an unrelated branch to a repository?
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    <p>While helping a friend with a git problem today, I had to introduce a branch that needed to be totally separate from the <code>master</code> branch. The contents of this branch really had a different origin from what had been developed on the <code>master</code> branch, but they were going to be merged into the <code>master</code> branch at a later time.</p> <p>I remembered from reading John Wiegley's <a href="http://ftp.newartisans.com/pub/git.from.bottom.up.pdf" rel="noreferrer">Git from the bottom up</a> how branches are essentially a label to a commit that follows a certain convention and how a commit is tied to a tree of files and, optionally to parent commits. We went to create a parentless commit to the existing repository using git's plumbing:</p> <p>So we got rid of all files in the index ...</p> <pre><code>$ git rm -rf . </code></pre> <p>... extracted directories and files from a tarball, added those to the index ...</p> <pre><code>$ git add . </code></pre> <p>... and created a tree object ...</p> <pre><code>$ git write-tree </code></pre> <p>(<code>git-write-tree</code> told us the sha1sum of the created tree object.)</p> <p>Then, We committed the tree, without specifying parent commits...</p> <pre><code>$ echo "Imported project foo" | git commit-tree $TREE </code></pre> <p>(<code>git-commit-tree</code> told us the sha1sum of the created commit object.)</p> <p>... and created a new branch that points to our newly created commit.</p> <pre><code>$ git update-ref refs/heads/other-branch $COMMIT </code></pre> <p>Finally, we returned to the <code>master</code> branch to continue work there.</p> <pre><code>$ git checkout -f master </code></pre> <p>This seems to have worked as planned. But this is clearly not the kind of procedure I would recommend to someone who is just getting started using git, to put it mildly. <strong>Is there an easier way of creating a new branch that is entirely unrelated to everything that has happened in the repository so far?</strong></p>
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