$ git clone -n https://src.fedoraproject.org/rpms/golang-modernc-ccgo-3.git /var/lib/mock/f45-build-39438-735/root/chroot_tmpdir/scmroot/golang-modernc-ccgo-3
Cloning into '/var/lib/mock/f45-build-39438-735/root/chroot_tmpdir/scmroot/golang-modernc-ccgo-3'...
$ git fetch origin eddc5b2df83b58f421983f5109ad2ca70aee59e9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-modernc-ccgo-3
 * [new ref]         eddc5b2df83b58f421983f5109ad2ca70aee59e9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eddc5b2 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild