$ git clone -n https://src.fedoraproject.org/rpms/rust-rustfix.git /var/lib/mock/f40-build-2657927-66917/root/chroot_tmpdir/scmroot/rust-rustfix
Cloning into '/var/lib/mock/f40-build-2657927-66917/root/chroot_tmpdir/scmroot/rust-rustfix'...
$ git fetch origin 10b1f5dc424a1b18672ddd1fce308fa279631e77:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rustfix
 * [new ref]         10b1f5dc424a1b18672ddd1fce308fa279631e77 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 10b1f5d Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild