$ git clone -n https://gitee.com/mgb01105731/ffmpeg_2.git /var/lib/mock/dist-an23-epao-build-512891-75101/root/chroot_tmpdir/scmroot/ffmpeg_2
Cloning into '/var/lib/mock/dist-an23-epao-build-512891-75101/root/chroot_tmpdir/scmroot/ffmpeg_2'...
$ git fetch origin 4cb3d25b67cbaeb604999b2410ce291452db137a:KOJI_FETCH_HEAD
From https://gitee.com/mgb01105731/ffmpeg_2
 * [new ref]         4cb3d25b67cbaeb604999b2410ce291452db137a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4cb3d25 test