$ git clone -n https://src.fedoraproject.org/rpms/mingw-libxml++.git /var/lib/mock/f45-build-18589-523/root/chroot_tmpdir/scmroot/mingw-libxml++
Cloning into '/var/lib/mock/f45-build-18589-523/root/chroot_tmpdir/scmroot/mingw-libxml++'...
$ git fetch origin c15bb5ad1deefa4edebabbfa94fed6e75353be58:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mingw-libxml++
 * [new ref]         c15bb5ad1deefa4edebabbfa94fed6e75353be58 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c15bb5a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild