$ git clone -n https://gitee.com/kanghou-silver/gdb.git /var/lib/mock/dist-an23-build-452656-73514/root/chroot_tmpdir/scmroot/gdb
Cloning into '/var/lib/mock/dist-an23-build-452656-73514/root/chroot_tmpdir/scmroot/gdb'...
$ git fetch origin 83912f9993224e0f0fedd6a269e81b668fdeaa80:KOJI_FETCH_HEAD
From https://gitee.com/kanghou-silver/gdb
 * [new ref]         83912f9993224e0f0fedd6a269e81b668fdeaa80 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 83912f9 add support for sw64