$ git clone -n https://src.fedoraproject.org/rpms/mathgl.git /var/lib/mock/f40-build-2186376-51354/root/chroot_tmpdir/scmroot/mathgl
Cloning into '/var/lib/mock/f40-build-2186376-51354/root/chroot_tmpdir/scmroot/mathgl'...
$ git fetch origin 23e53f7622f9aaf585a7bf70faa022c17774ea82:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mathgl
 * [new ref]         23e53f7622f9aaf585a7bf70faa022c17774ea82 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 23e53f7 Rebuild for openmpi 5.0.0, drops i686 and C++ API