$ git clone -n https://src.fedoraproject.org/rpms/rust-darling_macro0.14.git /var/lib/mock/f40-build-2652336-66892/root/chroot_tmpdir/scmroot/rust-darling_macro0.14
Cloning into '/var/lib/mock/f40-build-2652336-66892/root/chroot_tmpdir/scmroot/rust-darling_macro0.14'...
$ git fetch origin c6f840274f2e56357707b47a28fe80f28cfd2dd6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-darling_macro0.14
 * [new ref]         c6f840274f2e56357707b47a28fe80f28cfd2dd6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c6f8402 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild