$ git clone -n https://src.fedoraproject.org/rpms/sparrow.git /var/lib/mock/f42-build-side-1-3504329-45983/root/chroot_tmpdir/scmroot/sparrow
Cloning into '/var/lib/mock/f42-build-side-1-3504329-45983/root/chroot_tmpdir/scmroot/sparrow'...
$ git fetch origin c5bb0da6acff7a89d4cb22259eecf6697cf25bd1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sparrow
 * [new ref]         c5bb0da6acff7a89d4cb22259eecf6697cf25bd1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c5bb0da Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild