$ git clone -n https://src.fedoraproject.org/rpms/rust-str_stack.git /var/lib/mock/f42-build-3234174-41196/root/chroot_tmpdir/scmroot/rust-str_stack
Cloning into '/var/lib/mock/f42-build-3234174-41196/root/chroot_tmpdir/scmroot/rust-str_stack'...
$ git fetch origin c7d7fbd49c9e77285b6cf2a6595bab52092403e0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-str_stack
 * [new ref]         c7d7fbd49c9e77285b6cf2a6595bab52092403e0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c7d7fbd Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild