$ git clone -n https://src.fedoraproject.org/rpms/rpm-local-generator-support.git /var/lib/mock/f45-build-34643-690/root/chroot_tmpdir/scmroot/rpm-local-generator-support
Cloning into '/var/lib/mock/f45-build-34643-690/root/chroot_tmpdir/scmroot/rpm-local-generator-support'...
$ git fetch origin 69b7a5b2b2d99a33a5aee8c6b7bdabc416e95321:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rpm-local-generator-support
 * [new ref]         69b7a5b2b2d99a33a5aee8c6b7bdabc416e95321 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 69b7a5b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild