$ git clone -n https://src.fedoraproject.org/rpms/rust-unicode_categories.git /var/lib/mock/f40-build-2644279-66501/root/chroot_tmpdir/scmroot/rust-unicode_categories
Cloning into '/var/lib/mock/f40-build-2644279-66501/root/chroot_tmpdir/scmroot/rust-unicode_categories'...
$ git fetch origin 79756ae63783e4d4beab64b7c92e337f5ee99da0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-unicode_categories
 * [new ref]         79756ae63783e4d4beab64b7c92e337f5ee99da0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 79756ae Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild