$ git clone -n https://src.fedoraproject.org/rpms/rrdtool.git /var/lib/mock/f42-build-side-1-3588712-46949/root/chroot_tmpdir/scmroot/rrdtool
Cloning into '/var/lib/mock/f42-build-side-1-3588712-46949/root/chroot_tmpdir/scmroot/rrdtool'...
$ git fetch origin 43ab1aa63aed44a2aefc9335206f00bbeb8a9eb5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rrdtool
 * [new ref]         43ab1aa63aed44a2aefc9335206f00bbeb8a9eb5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 43ab1aa Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild