$ git clone -n https://src.fedoraproject.org/rpms/qt6-qtserialbus.git /var/lib/mock/f40-build-2352171-60193/root/chroot_tmpdir/scmroot/qt6-qtserialbus
Cloning into '/var/lib/mock/f40-build-2352171-60193/root/chroot_tmpdir/scmroot/qt6-qtserialbus'...
$ git fetch origin b3540dffeb344cb3f72aabbd0feadf9343dffcf9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt6-qtserialbus
 * [new ref]         b3540dffeb344cb3f72aabbd0feadf9343dffcf9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b3540df Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild