$ git clone -n https://src.fedoraproject.org/rpms/libsixel.git /var/lib/mock/f40-build-1682183-24246/root/chroot_tmpdir/scmroot/libsixel
Cloning into '/var/lib/mock/f40-build-1682183-24246/root/chroot_tmpdir/scmroot/libsixel'...
$ git fetch origin a0aaf5d9d73605c79c9f39ad00e882df74ac5db1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libsixel
 * [new ref]         a0aaf5d9d73605c79c9f39ad00e882df74ac5db1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a0aaf5d Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild