Documentation / pull-fetch-param.txton commit hashmap: add string interning API (7b64d42)
   1<repository>::
   2        The "remote" repository that is the source of a fetch
   3        or pull operation.  This parameter can be either a URL
   4        (see the section <<URLS,GIT URLS>> below) or the name
   5        of a remote (see the section <<REMOTES,REMOTES>> below).
   6
   7ifndef::git-pull[]
   8<group>::
   9        A name referring to a list of repositories as the value
  10        of remotes.<group> in the configuration file.
  11        (See linkgit:git-config[1]).
  12endif::git-pull[]
  13
  14<refspec>::
  15        Specifies which refs to fetch and which local refs to update.
  16        When no <refspec>s appear on the command line, the refs to fetch
  17        are read from `remote.<repository>.fetch` variables instead
  18ifndef::git-pull[]
  19        (see <<CRTB,CONFIGURED REMOTE-TRACKING BRANCHES>> below).
  20endif::git-pull[]
  21ifdef::git-pull[]
  22        (see linkgit:git-fetch[1]).
  23endif::git-pull[]
  24+
  25The format of a <refspec> parameter is an optional plus
  26`+`, followed by the source ref <src>, followed
  27by a colon `:`, followed by the destination ref <dst>.
  28The colon can be omitted when <dst> is empty.
  29+
  30`tag <tag>` means the same as `refs/tags/<tag>:refs/tags/<tag>`;
  31it requests fetching everything up to the given tag.
  32+
  33The remote ref that matches <src>
  34is fetched, and if <dst> is not empty string, the local
  35ref that matches it is fast-forwarded using <src>.
  36If the optional plus `+` is used, the local ref
  37is updated even if it does not result in a fast-forward
  38update.
  39+
  40[NOTE]
  41When the remote branch you want to fetch is known to
  42be rewound and rebased regularly, it is expected that
  43its new tip will not be descendant of its previous tip
  44(as stored in your remote-tracking branch the last time
  45you fetched).  You would want
  46to use the `+` sign to indicate non-fast-forward updates
  47will be needed for such branches.  There is no way to
  48determine or declare that a branch will be made available
  49in a repository with this behavior; the pulling user simply
  50must know this is the expected usage pattern for a branch.
  51ifdef::git-pull[]
  52+
  53[NOTE]
  54There is a difference between listing multiple <refspec>
  55directly on 'git pull' command line and having multiple
  56`remote.<repository>.fetch` entries in your configuration
  57for a <repository> and running a
  58'git pull' command without any explicit <refspec> parameters.
  59<refspec>s listed explicitly on the command line are always
  60merged into the current branch after fetching.  In other words,
  61if you list more than one remote ref, 'git pull' will create
  62an Octopus merge.  On the other hand, if you do not list any
  63explicit <refspec> parameter on the command line, 'git pull'
  64will fetch all the <refspec>s it finds in the
  65`remote.<repository>.fetch` configuration and merge
  66only the first <refspec> found into the current branch.
  67This is because making an
  68Octopus from remote refs is rarely done, while keeping track
  69of multiple remote heads in one-go by fetching more than one
  70is often useful.
  71endif::git-pull[]