$ git clone -n https://src.fedoraproject.org/rpms/golang-github-streadway-handy.git /var/lib/mock/f45-build-12521-442/root/chroot_tmpdir/scmroot/golang-github-streadway-handy
Cloning into '/var/lib/mock/f45-build-12521-442/root/chroot_tmpdir/scmroot/golang-github-streadway-handy'...
$ git fetch origin 6a26f21938cd17e87bc3dea00ef798402687b965:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-streadway-handy
 * [new ref]         6a26f21938cd17e87bc3dea00ef798402687b965 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6a26f21 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild