$ git clone -n https://src.fedoraproject.org/rpms/rust-option-ext.git /var/lib/mock/f40-build-2326267-58829/root/chroot_tmpdir/scmroot/rust-option-ext
Cloning into '/var/lib/mock/f40-build-2326267-58829/root/chroot_tmpdir/scmroot/rust-option-ext'...
$ git fetch origin a6860bfd11ffa3b76228fa845b371eab7eab9ec2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-option-ext
 * [new ref]         a6860bfd11ffa3b76228fa845b371eab7eab9ec2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a6860bf Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild