$ git clone -n https://src.fedoraproject.org/rpms/golang-gopkg-stack-0.git /var/lib/mock/f45-build-12680-443/root/chroot_tmpdir/scmroot/golang-gopkg-stack-0
Cloning into '/var/lib/mock/f45-build-12680-443/root/chroot_tmpdir/scmroot/golang-gopkg-stack-0'...
$ git fetch origin 7bfdde2caa814fa56d64afa0f1d6de41d6e7d6c7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-gopkg-stack-0
 * [new ref]         7bfdde2caa814fa56d64afa0f1d6de41d6e7d6c7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7bfdde2 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild