$ git clone -n https://src.fedoraproject.org/rpms/libXNVCtrl.git /var/lib/mock/f45-build-15781-479/root/chroot_tmpdir/scmroot/libXNVCtrl
Cloning into '/var/lib/mock/f45-build-15781-479/root/chroot_tmpdir/scmroot/libXNVCtrl'...
$ git fetch origin 88fa9e068737d21ea8be763c20dc905257591b88:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libXNVCtrl
 * [new ref]         88fa9e068737d21ea8be763c20dc905257591b88 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 88fa9e0 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild