$ git clone -n https://src.fedoraproject.org/rpms/rust-stacker.git /var/lib/mock/f39-build-1517218-35700/root/chroot_tmpdir/scmroot/rust-stacker
Cloning into '/var/lib/mock/f39-build-1517218-35700/root/chroot_tmpdir/scmroot/rust-stacker'...
$ git fetch origin 031d39c4e25a9dfc79d6e02ac017994bc0e66f0a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-stacker
 * [new ref]         031d39c4e25a9dfc79d6e02ac017994bc0e66f0a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 031d39c Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild