$ git clone -n https://src.fedoraproject.org/rpms/rust-gix-refspec.git /var/lib/mock/f40-build-2625191-65160/root/chroot_tmpdir/scmroot/rust-gix-refspec
Cloning into '/var/lib/mock/f40-build-2625191-65160/root/chroot_tmpdir/scmroot/rust-gix-refspec'...
$ git fetch origin 42560c684f8ee82b75da27ad06af4421fbd47c16:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gix-refspec
 * [new ref]         42560c684f8ee82b75da27ad06af4421fbd47c16 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 42560c6 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild