Last eight digits are used to indicate a SHA-1

[ElDeveloper]

Currently the packages that are downloaded from a repository, are referenced by the last eight characters of the SHA-1 at which the head of the git tree was when the repository was cloned instead of the first eight.

i. e. if I install a repository where the HEAD is currently found at 9f0db1a1b1a9c0754fddf33843ed36e342a0b016, the output directory will be:

windows-xp-latest-repository-42a0b016

Instead of:

windows-xp-latest-repository-9f0db1a1