In Git, everything is possible. But for some common commands which I would like to execute often I wrote these shortcut scripts.

Most of them had to be implemented on the Plumbing level (which means, a little bit of hacking), but provide features useful for me such as:

git heads-for-merge

what does your FETCH_HEAD say about all the heads that have been fetched for merge?

git the-empty-tree

the ID to use if you need to refer to the empty tree in your (tree-merging) commands

git mread-and-commit

read in multiple refs, merge the trees, and then make a merge commit, without touching your index or the working dir (useful for managing imported histories)

git merge-without-working

the same idea -- advance your HEAD by merging, but without touching your working dir

Some of them are very simple scripts, of course, but they are useful because they bring you higher from the level of Plumbing.

Some scripts written without hacking (I would say so; i.e., on top of the Porcelain), which are useful for me:

git roots-of-hist

find the commits in the histories without parents (useful for managing imported histories);

git push-as-remote

creates "backward"-tracking branches in a remote repo, useful for keeping track of the states of the files in all your working places.

More scripts are to come.

I publish them under GPLv2 (or later, your choice) to be compatible with the mainline Git (I'd like to submit some of them for inclusion in the mainline Git, e.g., the patch for git heads-for-merge.

There is a mirror at Gitorious (with a different web interface).