$ git clone -n https://gitee.com/fundawang/gtkmm30.git /var/lib/mock/dist-an23-build-295426-65781/root/chroot_tmpdir/scmroot/gtkmm30
Cloning into '/var/lib/mock/dist-an23-build-295426-65781/root/chroot_tmpdir/scmroot/gtkmm30'...
$ git fetch origin 755adf01aad6d2d6bc754b91caa2d6724adc2821:KOJI_FETCH_HEAD
From https://gitee.com/fundawang/gtkmm30
 * [new ref]         755adf01aad6d2d6bc754b91caa2d6724adc2821 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 755adf0 3.24.8