$ git clone -n https://src.fedoraproject.org/rpms/golang-github-zeebo-pcg.git /var/lib/mock/f45-build-12618-442/root/chroot_tmpdir/scmroot/golang-github-zeebo-pcg
Cloning into '/var/lib/mock/f45-build-12618-442/root/chroot_tmpdir/scmroot/golang-github-zeebo-pcg'...
$ git fetch origin c49eb146779b2f4ebd092e9453a36fb43d2fc9d8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-zeebo-pcg
 * [new ref]         c49eb146779b2f4ebd092e9453a36fb43d2fc9d8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c49eb14 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild