$ git clone -n https://git.cclinux.org/stage/rpms/gnome-shell-extensions.git /var/lib/mock/dist-circle8-build-110308-66433/root/chroot_tmpdir/scmroot/gnome-shell-extensions
Cloning into '/var/lib/mock/dist-circle8-build-110308-66433/root/chroot_tmpdir/scmroot/gnome-shell-extensions'...
$ git fetch origin 6ab47dd66b2ff8befd318c6e6e14dcc6ece0050e:KOJI_FETCH_HEAD
From https://git.cclinux.org/stage/rpms/gnome-shell-extensions
 * [new ref]         6ab47dd66b2ff8befd318c6e6e14dcc6ece0050e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6ab47dd import gnome-shell-extensions-3.32.1-35.el8