$ git clone -n https://src.fedoraproject.org/rpms/libpoly.git /var/lib/mock/f38-build-side-42-init-devel-686065-26759/root/chroot_tmpdir/scmroot/libpoly
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-686065-26759/root/chroot_tmpdir/scmroot/libpoly'...
$ git fetch origin 1a6e4f2d0b191cca02068af9951330dd4ba7db2a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libpoly
 * [new ref]         1a6e4f2d0b191cca02068af9951330dd4ba7db2a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1a6e4f2 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild