$ git clone -n https://src.fedoraproject.org/rpms/golang-github-posener-autogen.git /var/lib/mock/f45-build-12435-442/root/chroot_tmpdir/scmroot/golang-github-posener-autogen
Cloning into '/var/lib/mock/f45-build-12435-442/root/chroot_tmpdir/scmroot/golang-github-posener-autogen'...
$ git fetch origin ab1050a3ca8f827226bf13d2fbc61b12fc4e24df:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-posener-autogen
 * [new ref]         ab1050a3ca8f827226bf13d2fbc61b12fc4e24df -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ab1050a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild