$ git clone -n https://src.fedoraproject.org/rpms/giac.git /var/lib/mock/f39-build-1598951-38511/root/chroot_tmpdir/scmroot/giac
Cloning into '/var/lib/mock/f39-build-1598951-38511/root/chroot_tmpdir/scmroot/giac'...
$ git fetch origin 167b1e24bf196e6df4df3cfd034a481cfb71c2a9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/giac
 * [new ref]         167b1e24bf196e6df4df3cfd034a481cfb71c2a9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 167b1e2 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild