$ git clone -n https://src.fedoraproject.org/rpms/rust-castaway.git /var/lib/mock/f40-build-2035287-47952/root/chroot_tmpdir/scmroot/rust-castaway
Cloning into '/var/lib/mock/f40-build-2035287-47952/root/chroot_tmpdir/scmroot/rust-castaway'...
$ git fetch origin 7cabba20bddd47c56fbf140d06db67960b3046af:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-castaway
 * [new ref]         7cabba20bddd47c56fbf140d06db67960b3046af -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7cabba2 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild