X-Git-Url: https://git.xandkar.net/?a=blobdiff_plain;ds=sidebyside;f=README.md;h=f23a0684bf66768af7bec5acbc43e8f11a7dd648;hb=66329b9492ea944c441d8be9961cb41214be7c20;hp=bca3d59d8b7bef65182a80dbfcda8fdd5c017d64;hpb=6b6ba9f3495de246fe962f2b23fc62b966c3ab5b;p=git-cheat-sheet.git

diff --git a/README.md b/README.md
index bca3d59..f23a068 100644
--- a/README.md
+++ b/README.md
@@ -7,9 +7,9 @@ How to do stuff with git
 Splitting a repo
 ----------------
 
-### Remove history of all but select files in cloned repo
+##### Remove history of all but select files in cloned repo
 ```sh
-$ cp -Rp old new
+$ git clone old new
 $ cd new
 $ git clean -dfx
 $ git gc --aggressive --prune=now
@@ -27,9 +27,47 @@ $ git filter-branch \
 $ git gc --aggressive --prune=now
 ```
 
-### Remove history of previously-removed (not in current tree) files
+##### Remove history of previously-removed (not in current tree) files
 ```sh
-$ git log --pretty=format: --name-status | awk '$0 != "" {print $2}' | sort -u > /tmp/tree.old
+$ git log --pretty=format: --name-status \
+    | awk '$0 != "" {print $2}' \
+    | sort -u > /tmp/tree.old
 $ git ls-tree -r --name-only HEAD > /tmp/tree.new
-$ git filter-branch --prune-empty --index-filter 'grep -Fvxf /tmp/tree.new /tmp/tree.old | xargs git rm --cached -r --ignore-unmatch' HEAD
+$ git filter-branch \
+    --prune-empty \
+    --index-filter '
+        grep -Fvxf /tmp/tree.new /tmp/tree.old \
+        | xargs git rm --cached -r --ignore-unmatch
+    ' \
+    HEAD
+```
+
+
+Inserting a new root commit
+---------------------------
+```sh
+git checkout --orphan $TEMP_BRANCH
+git rm -rf .
+git commit --allow-empty -m $INIT_COMMIT_MSG
+git rebase --onto $TEMP_BRANCH --root $MAIN_BRANCH
+git branch -d $TEMP_BRANCH
+```
+
+
+Deleting all tags, locally and remotely
+---------------------------------------
+```sh
+for tag in `git tag`;
+do
+    git tag -d $tag
+    git push $REMOTE_NAME :refs/tags/$tag
+done
+```
+
+
+Get an older version of a file
+------------------------------
+
+```sh
+git cat-file -p $COMMIT_DIGEST:$FILE_PATH
 ```