$ git clone -n https://gitee.com/wency_cn/libgexiv2.git /var/lib/mock/dist-an23-build-502407-74802/root/chroot_tmpdir/scmroot/libgexiv2
Cloning into '/var/lib/mock/dist-an23-build-502407-74802/root/chroot_tmpdir/scmroot/libgexiv2'...
$ git fetch origin e88fd5238b3a29b7deafc77fd3bb439627b395c1:KOJI_FETCH_HEAD
From https://gitee.com/wency_cn/libgexiv2
 * [new ref]         e88fd5238b3a29b7deafc77fd3bb439627b395c1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e88fd52 Update code from upstream