Update README.md

README.md

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 # aur.git
 
 This is an experimental mirror of the aur.git repository backing [the AUR](https://aur.archlinux.org).
+
+**This is a fork,** to host personalizations of packages.
+
+## as a remote of `~/.cache/yay/$PKG`
+
+Example `.git/config` of `~/.cache/yay/texlive-installer`:
+
+```gitconfig
+[core]
+ repositoryformatversion = 0
+ filemode = true
+ bare = false
+ logallrefupdates = true
+[remote "origin"]
+ url = https://aur.archlinux.org/texlive-installer.git
+ fetch = +refs/heads/*:refs/remotes/origin/*
+[branch "master"]
+ remote = origin
+ merge = refs/heads/master
+## ... above generated by yay
+## ... below added by user
+[remote "p13n"]
+ url = [email protected]:bryango/aur.git
+ fetch = +refs/heads/texlive-installer:refs/remotes/p13n/texlive-installer ## restrict fetch heads
+ push = p13n/texlive-installer ## push to branch: texlive-installer
+[remote]
+ pushdefault = p13n ## push to remote: p13n
+```