$ git clone -n https://src.fedoraproject.org/rpms/rust-serde_derive_internals.git /var/lib/mock/f40-build-2654468-66906/root/chroot_tmpdir/scmroot/rust-serde_derive_internals
Cloning into '/var/lib/mock/f40-build-2654468-66906/root/chroot_tmpdir/scmroot/rust-serde_derive_internals'...
$ git fetch origin f3ef174695e2ca3c8329bb3e2468a9b644319d69:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-serde_derive_internals
 * [new ref]         f3ef174695e2ca3c8329bb3e2468a9b644319d69 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f3ef174 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild