$ git clone -n https://src.fedoraproject.org/rpms/gogextract.git /var/lib/mock/f45-build-11691-434/root/chroot_tmpdir/scmroot/gogextract
Cloning into '/var/lib/mock/f45-build-11691-434/root/chroot_tmpdir/scmroot/gogextract'...
$ git fetch origin c31daedf44574db012ecf7b442ca9d39aef8fcad:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gogextract
 * [new ref]         c31daedf44574db012ecf7b442ca9d39aef8fcad -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c31daed Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild