$ git clone -n https://gitee.com/hongwei-qin/mupdf.git /var/lib/mock/dist-an23.3-build-426775-72998/root/chroot_tmpdir/scmroot/mupdf
Cloning into '/var/lib/mock/dist-an23.3-build-426775-72998/root/chroot_tmpdir/scmroot/mupdf'...
$ git fetch origin 63e058600059b937d00dcdd8bc46129c7b690b26:KOJI_FETCH_HEAD
From https://gitee.com/hongwei-qin/mupdf
 * [new ref]         63e058600059b937d00dcdd8bc46129c7b690b26 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 63e0586 Rebuild with openjpeg2-devel