$ git clone -n https://gitee.com/sys0613/mozjs78.git /var/lib/mock/dist-an23-build-272786-64181/root/chroot_tmpdir/scmroot/mozjs78
Cloning into '/var/lib/mock/dist-an23-build-272786-64181/root/chroot_tmpdir/scmroot/mozjs78'...
$ git fetch origin ba7e11c0ee82d45fe2aa52aa117d5a15396b7546:KOJI_FETCH_HEAD
From https://gitee.com/sys0613/mozjs78
 * [new ref]         ba7e11c0ee82d45fe2aa52aa117d5a15396b7546 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ba7e11c Drop mozjs as orphan package