$ git clone -n https://src.fedoraproject.org/rpms/rust-unicode_names2_generator.git /var/lib/mock/f42-build-3251788-41222/root/chroot_tmpdir/scmroot/rust-unicode_names2_generator
Cloning into '/var/lib/mock/f42-build-3251788-41222/root/chroot_tmpdir/scmroot/rust-unicode_names2_generator'...
$ git fetch origin 6294ffde03fd14faf3df30ca654aa1ad7f9e5d63:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-unicode_names2_generator
 * [new ref]         6294ffde03fd14faf3df30ca654aa1ad7f9e5d63 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6294ffd Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild