$ git clone -n https://gitee.com/idolsama/libffi.git /var/lib/mock/dist-an23-build-325959-68956/root/chroot_tmpdir/scmroot/libffi
Cloning into '/var/lib/mock/dist-an23-build-325959-68956/root/chroot_tmpdir/scmroot/libffi'...
$ git fetch origin 8763ccb226fabe4a6a8b9b043af208e0c5054d71:KOJI_FETCH_HEAD
From https://gitee.com/idolsama/libffi
 * [new ref]         8763ccb226fabe4a6a8b9b043af208e0c5054d71 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8763ccb Add RISC-V 64 support