我创建了一个名为“f”的分支并进行了结帐。当我尝试git pull命令时，我收到了这条消息：

You have not concluded your merge (MERGE_HEAD exists).
Please, commit your changes before you can merge.

当我尝试时git status，它给了我以下信息：

On branch master
# Your branch and 'origin/master' have diverged,
# and have 1 and 13 different commit(s) each, respectively.
#
# Changes to be committed:
#
#   modified:   app/assets/images/backward.png
#   modified:   app/assets/images/forward.png
#   new file:   app/assets/images/index_background.jpg
#   new file:   app/assets/images/loading.gif
#   modified:   app/assets/images/pause.png
#   modified:   app/assets/images/play.png
#   new file:   app/assets/javascripts/jquery-ui-bootstrap.js
#   new file:   app/assets/stylesheets/jquery-ui-bootstrap.css
#   modified:   app/controllers/friends_controller.rb
#   modified:   app/controllers/plays_controller.rb
#   modified:   app/mailers/invite_friends_mailer.rb
#   modified:   app/mailers/send_plays_mailer.rb
#   modified:   app/mailers/shot_chart_mailer.rb
#   modified:   app/views/friends/show_plays.html.erb
#   modified:   app/views/layouts/application.html.erb
#   modified:   app/views/plays/_inbox_table.html.erb
#   modified:   app/views/plays/show.html.erb
#   modified:   app/views/welcome/contact_form.html.erb
#   modified:   app/views/welcome/index.html.erb
#   modified:   log/development.log
#   modified:   log/restclient.log
#   new file:   tmp/cache/assets/C1A/C00/sprockets%2Fb7901e0813446f810e560158a1a97066
#   modified:   tmp/cache/assets/C64/930/sprockets%2F65aa1510292214f4fd1342280d521e4c
#   new file:   tmp/cache/assets/C73/C40/sprockets%2F96912377b93498914dd04bc69fa98585
#   new file:   tmp/cache/assets/CA9/090/sprockets%2Fa71992733a432421e67e03ff1bd441d8
#   new file:   tmp/cache/assets/CCD/7E0/sprockets%2F47125c2ebd0e8b29b6511b7b961152a1
#   modified:   tmp/cache/assets/CD5/DD0/sprockets%2F59d317902de6e0f68689899259caff26
#   modified:   tmp/cache/assets/CE3/080/sprockets%2F5c3b516e854760f14eda2395c4ff2581
#   new file:   tmp/cache/assets/CED/B20/sprockets%2F423772fde44ab6f6f861639ee71444c4
#   new file:   tmp/cache/assets/D0C/E10/sprockets%2F8d1f4b30c6be13017565fe1b697156ce
#   new file:   tmp/cache/assets/D12/290/sprockets%2F93ae21f3cdd5e24444ae4651913fd875
#   new file:   tmp/cache/assets/D13/FC0/sprockets%2F57aad34b9d3c9e225205237dac9b1999
#   new file:   tmp/cache/assets/D1D/DE0/sprockets%2F5840ff4283f6545f472be8e10ce67bb8
#   new file:   tmp/cache/assets/D23/BD0/sprockets%2F439d5dedcc8c54560881edb9f0456819
#   new file:   tmp/cache/assets/D24/570/sprockets%2Fb449db428fc674796e18b7a419924afe
#   new file:   tmp/cache/assets/D28/480/sprockets%2F9aeec798a04544e478806ffe57e66a51
#   new file:   tmp/cache/assets/D3A/ED0/sprockets%2Fcd959cbf710b366c145747eb3c062bb4
#   new file:   tmp/cache/assets/D3C/060/sprockets%2F363ac7c9208d3bb5d7047f11c159d7ce
#   new file:   tmp/cache/assets/D48/D00/sprockets%2Fe23c97b8996e7b5567a3080c285aaccb
#   new file:   tmp/cache/assets/D6A/900/sprockets%2Fa5cece9476b21aa4d5f46911ca96c450
#   new file:   tmp/cache/assets/D6C/510/sprockets%2Fb086a020de3c258cb1c67dfc9c67d546
#   new file:   tmp/cache/assets/D70/F30/sprockets%2Facf9a6348722adf1ee7abbb695603078
#   new file:   tmp/cache/assets/DA3/4A0/sprockets%2F69c26d0a9ca8ce383e20897cefe05aa4
#   new file:   tmp/cache/assets/DA7/2F0/sprockets%2F61da396fb86c5ecd844a2d83ac759b4b
#   new file:   tmp/cache/assets/DB9/C80/sprockets%2F876fbfb9685b2b8ea476fa3c67ae498b
#   new file:   tmp/cache/assets/DBD/7A0/sprockets%2F3640ea84a1dfaf6f91a01d1d6fbe223d
#   new file:   tmp/cache/assets/DC1/8D0/sprockets%2Fe5ee1f1cfba2144ec00b1dcd6773e691
#   new file:   tmp/cache/assets/DCC/E60/sprockets%2Fd6a95f601456c93ff9a1bb70dea3dfc0
#   new file:   tmp/cache/assets/DF1/130/sprockets%2Fcda4825bb42c91e2d1f1ea7b2b958bda
#   new file:   tmp/cache/assets/E23/DE0/sprockets%2Fb1acc25c28cd1fabafbec99d169163d3
#   new file:   tmp/cache/assets/E23/FD0/sprockets%2Fea3dbcd1f341008ef8be67b1ccc5a9c5
#   modified:   tmp/cache/assets/E4E/AD0/sprockets%2Fb930f45cfe7c6a8d0efcada3013cc4bc
#   new file:   tmp/cache/assets/E63/7D0/sprockets%2F77de495a665c3ebcb47befecd07baae6
#   modified:   tmp/pids/server.pid
#
# Untracked files:
#   (use "git add <file>..." to include in what will be committed)
#
#   Coachbase/
#   log/development.log.orig
#   log/restclient.log.orig

我该怎么办？