made the pack completely portable and wrote relevent bat files to go with it

gitportable/mingw64/share/doc/git-doc/gitformat-bundle.adoc

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+gitformat-bundle(5)
+===================
+
+NAME
+----
+gitformat-bundle - The bundle file format
+
+
+SYNOPSIS
+--------
+[verse]
+*.bundle
+*.bdl
+
+DESCRIPTION
+-----------
+
+The Git bundle format is a format that represents both refs and Git
+objects. A bundle is a header in a format similar to
+linkgit:git-show-ref[1] followed by a pack in *.pack format.
+
+The format is created and read by the linkgit:git-bundle[1] command,
+and supported by e.g. linkgit:git-fetch[1] and linkgit:git-clone[1].
+
+
+FORMAT
+------
+
+We will use ABNF notation to define the Git bundle format. See
+linkgit:gitprotocol-common[5] for the details.
+
+A v2 bundle looks like this:
+
+----
+bundle    = signature *prerequisite *reference LF pack
+signature = "# v2 git bundle" LF
+
+prerequisite = "-" obj-id SP comment LF
+comment      = *CHAR
+reference    = obj-id SP refname LF
+
+pack         = ... ; packfile
+----
+
+A v3 bundle looks like this:
+
+----
+bundle    = signature *capability *prerequisite *reference LF pack
+signature = "# v3 git bundle" LF
+
+capability   = "@" key ["=" value] LF
+prerequisite = "-" obj-id SP comment LF
+comment      = *CHAR
+reference    = obj-id SP refname LF
+key          = 1*(ALPHA / DIGIT / "-")
+value        = *(%01-09 / %0b-FF)
+
+pack         = ... ; packfile
+----
+
+
+SEMANTICS
+---------
+
+A Git bundle consists of several parts.
+
+* "Capabilities", which are only in the v3 format, indicate functionality that
+	the bundle requires to be read properly.
+
+* "Prerequisites" list the objects that are NOT included in the bundle and the
+  reader of the bundle MUST already have, in order to use the data in the
+  bundle. The objects stored in the bundle may refer to prerequisite objects and
+  anything reachable from them (e.g. a tree object in the bundle can reference
+  a blob that is reachable from a prerequisite) and/or expressed as a delta
+  against prerequisite objects.
+
+* "References" record the tips of the history graph, iow, what the reader of the
+  bundle CAN "git fetch" from it.
+
+* "Pack" is the pack data stream "git fetch" would send, if you fetch from a
+  repository that has the references recorded in the "References" above into a
+  repository that has references pointing at the objects listed in
+  "Prerequisites" above.
+
+In the bundle format, there can be a comment following a prerequisite obj-id.
+This is a comment and it has no specific meaning. The writer of the bundle MAY
+put any string here. The reader of the bundle MUST ignore the comment.
+
+Note on shallow clones and Git bundles
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Note that the prerequisites do not represent a shallow-clone boundary. The
+semantics of the prerequisites and the shallow-clone boundaries are different,
+and the Git bundle v2 format cannot represent a shallow clone repository.
+
+CAPABILITIES
+------------
+
+Because there is no opportunity for negotiation, unknown capabilities cause 'git
+bundle' to abort.
+
+* `object-format` specifies the hash algorithm in use, and can take the same
+  values as the `extensions.objectFormat` configuration value.
+
+* `filter` specifies an object filter as in the `--filter` option in
+  linkgit:git-rev-list[1]. The resulting pack-file must be marked as a
+  `.promisor` pack-file after it is unbundled.
+
+GIT
+---
+Part of the linkgit:git[1] suite