$ git clone -n https://src.fedoraproject.org/rpms/rust-unic-ucd-category.git /var/lib/mock/f40-build-2644292-66501/root/chroot_tmpdir/scmroot/rust-unic-ucd-category
Cloning into '/var/lib/mock/f40-build-2644292-66501/root/chroot_tmpdir/scmroot/rust-unic-ucd-category'...
$ git fetch origin 557311909b1d064a7ae81d489fdfb420a5bf9870:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-unic-ucd-category
 * [new ref]         557311909b1d064a7ae81d489fdfb420a5bf9870 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5573119 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild