$ git clone -n https://src.fedoraproject.org/rpms/golang-github-jinzhu-now.git /var/lib/mock/f45-build-12099-437/root/chroot_tmpdir/scmroot/golang-github-jinzhu-now
Cloning into '/var/lib/mock/f45-build-12099-437/root/chroot_tmpdir/scmroot/golang-github-jinzhu-now'...
$ git fetch origin 05fcfde7bcea5a9cf5d622c857350a420920a02a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-jinzhu-now
 * [new ref]         05fcfde7bcea5a9cf5d622c857350a420920a02a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 05fcfde Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild