$ git clone -n https://src.fedoraproject.org/rpms/golang-gopkg-warnings-0.git /var/lib/mock/f45-build-12702-443/root/chroot_tmpdir/scmroot/golang-gopkg-warnings-0
Cloning into '/var/lib/mock/f45-build-12702-443/root/chroot_tmpdir/scmroot/golang-gopkg-warnings-0'...
$ git fetch origin fe8c6d1d7440734c540f99de62087e0015eed8ee:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-gopkg-warnings-0
 * [new ref]         fe8c6d1d7440734c540f99de62087e0015eed8ee -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fe8c6d1 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild