Add 'repos/fb9e68c7ec482d136c77/' from commit 'a31eb9b14ccf631ff56de7264d3461e66d075b1c'

git-subtree-dir: repos/fb9e68c7ec482d136c77
git-subtree-mainline: 092e91e6a3
git-subtree-split: a31eb9b14c

repos/fb9e68c7ec482d136c77/Git magic.md

@@ -0,0 +1,19 @@
+#GIT MAGIC
+
+## Create a submodule from a specific folder
+```
+git clone <your_project> <your_submodule>
+cd <your_submodule>
+git filter-branch --subdirectory-filter 'path/to/your/submodule' --prune-empty -- --all
+```
+
+## Remove a file from history
+
+```
+git filter-branch --force --index-filter \
+'git rm --cached --ignore-unmatch \#web40.tex\#' \
+--prune-empty --tag-name-filter cat -- --all
+```
+
+## Change commit date
+    git commit --amend --date="Wed Feb 16 14:00 2011 +0100"