merge(third_party/git): Merge squashed git subtree at v2.23.0 r/373

Merge commit '1b593e1ea4d2af0f6444d9a7788d5d99abd6fde5' as 'third_party/git'

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diff --git a/third_party/git/Documentation/git-fetch-pack.txt b/third_party/git/Documentation/git-fetch-pack.txt
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+git-fetch-pack(1)
+=================
+
+NAME
+----
+git-fetch-pack - Receive missing objects from another repository
+
+
+SYNOPSIS
+--------
+[verse]
+'git fetch-pack' [--all] [--quiet|-q] [--keep|-k] [--thin] [--include-tag]
+	[--upload-pack=<git-upload-pack>]
+	[--depth=<n>] [--no-progress]
+	[-v] <repository> [<refs>...]
+
+DESCRIPTION
+-----------
+Usually you would want to use 'git fetch', which is a
+higher level wrapper of this command, instead.
+
+Invokes 'git-upload-pack' on a possibly remote repository
+and asks it to send objects missing from this repository, to
+update the named heads.  The list of commits available locally
+is found out by scanning the local refs/ hierarchy and sent to
+'git-upload-pack' running on the other end.
+
+This command degenerates to download everything to complete the
+asked refs from the remote side when the local side does not
+have a common ancestor commit.
+
+
+OPTIONS
+-------
+--all::
+	Fetch all remote refs.
+
+--stdin::
+	Take the list of refs from stdin, one per line. If there
+	are refs specified on the command line in addition to this
+	option, then the refs from stdin are processed after those
+	on the command line.
++
+If `--stateless-rpc` is specified together with this option then
+the list of refs must be in packet format (pkt-line). Each ref must
+be in a separate packet, and the list must end with a flush packet.
+
+-q::
+--quiet::
+	Pass `-q` flag to 'git unpack-objects'; this makes the
+	cloning process less verbose.
+
+-k::
+--keep::
+	Do not invoke 'git unpack-objects' on received data, but
+	create a single packfile out of it instead, and store it
+	in the object database. If provided twice then the pack is
+	locked against repacking.
+
+--thin::
+	Fetch a "thin" pack, which records objects in deltified form based
+	on objects not included in the pack to reduce network traffic.
+
+--include-tag::
+	If the remote side supports it, annotated tags objects will
+	be downloaded on the same connection as the other objects if
+	the object the tag references is downloaded.  The caller must
+	otherwise determine the tags this option made available.
+
+--upload-pack=<git-upload-pack>::
+	Use this to specify the path to 'git-upload-pack' on the
+	remote side, if is not found on your $PATH.
+	Installations of sshd ignores the user's environment
+	setup scripts for login shells (e.g. .bash_profile) and
+	your privately installed git may not be found on the system
+	default $PATH.  Another workaround suggested is to set
+	up your $PATH in ".bashrc", but this flag is for people
+	who do not want to pay the overhead for non-interactive
+	shells by having a lean .bashrc file (they set most of
+	the things up in .bash_profile).
+
+--exec=<git-upload-pack>::
+	Same as --upload-pack=<git-upload-pack>.
+
+--depth=<n>::
+	Limit fetching to ancestor-chains not longer than n.
+	'git-upload-pack' treats the special depth 2147483647 as
+	infinite even if there is an ancestor-chain that long.
+
+--shallow-since=<date>::
+	Deepen or shorten the history of a shallow repository to
+	include all reachable commits after <date>.
+
+--shallow-exclude=<revision>::
+	Deepen or shorten the history of a shallow repository to
+	exclude commits reachable from a specified remote branch or tag.
+	This option can be specified multiple times.
+
+--deepen-relative::
+	Argument --depth specifies the number of commits from the
+	current shallow boundary instead of from the tip of each
+	remote branch history.
+
+--no-progress::
+	Do not show the progress.
+
+--check-self-contained-and-connected::
+	Output "connectivity-ok" if the received pack is
+	self-contained and connected.
+
+-v::
+	Run verbosely.
+
+<repository>::
+	The URL to the remote repository.
+
+<refs>...::
+	The remote heads to update from. This is relative to
+	$GIT_DIR (e.g. "HEAD", "refs/heads/master").  When
+	unspecified, update from all heads the remote side has.
++
+If the remote has enabled the options `uploadpack.allowTipSHA1InWant`,
+`uploadpack.allowReachableSHA1InWant`, or `uploadpack.allowAnySHA1InWant`,
+they may alternatively be 40-hex sha1s present on the remote.
+
+SEE ALSO
+--------
+linkgit:git-fetch[1]
+
+GIT
+---
+Part of the linkgit:git[1] suite