$ git clone -n https://gitee.com/tomcruiseqi/gdk-pixbuf2.git /var/lib/mock/dist-an23-build-463017-73836/root/chroot_tmpdir/scmroot/gdk-pixbuf2
Cloning into '/var/lib/mock/dist-an23-build-463017-73836/root/chroot_tmpdir/scmroot/gdk-pixbuf2'...
$ git fetch origin 6703aee86ad8e050819f3c3b863b03195742f212:KOJI_FETCH_HEAD
From https://gitee.com/tomcruiseqi/gdk-pixbuf2
 * [new ref]         6703aee86ad8e050819f3c3b863b03195742f212 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6703aee Rebuild