$ git clone -n https://src.fedoraproject.org/rpms/libburn.git /var/lib/mock/f39-build-1915597-42892/root/chroot_tmpdir/scmroot/libburn
Cloning into '/var/lib/mock/f39-build-1915597-42892/root/chroot_tmpdir/scmroot/libburn'...
$ git fetch origin 9a583c690543dfe99eaa87096d355bf4bd192243:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libburn
 * [new ref]         9a583c690543dfe99eaa87096d355bf4bd192243 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9a583c6 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild