$ git clone -n https://gitee.com/gaohongmei/libdnf.git /var/lib/mock/dist-an8.6-build-195071-60841/root/chroot_tmpdir/scmroot/libdnf
Cloning into '/var/lib/mock/dist-an8.6-build-195071-60841/root/chroot_tmpdir/scmroot/libdnf'...
$ git fetch origin 1915ac5bd588353b04cb9cdc4da8a93d076d0b38:KOJI_FETCH_HEAD
From https://gitee.com/gaohongmei/libdnf
 * [new ref]         1915ac5bd588353b04cb9cdc4da8a93d076d0b38 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1915ac5 optimise spec file & add doc package