$ git clone -n https://src.fedoraproject.org/rpms/libx86.git /var/lib/mock/f40-build-805628-144831/root/chroot_tmpdir/scmroot/libx86
Cloning into '/var/lib/mock/f40-build-805628-144831/root/chroot_tmpdir/scmroot/libx86'...
$ git fetch origin 42998f39b71f429948fc3e459c74c5224a4c3956:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libx86
 * [new ref]         42998f39b71f429948fc3e459c74c5224a4c3956 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 42998f3 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild