$ git clone -n https://src.fedoraproject.org/rpms/golang-github-xtgo-set.git /var/lib/mock/f45-build-12611-442/root/chroot_tmpdir/scmroot/golang-github-xtgo-set
Cloning into '/var/lib/mock/f45-build-12611-442/root/chroot_tmpdir/scmroot/golang-github-xtgo-set'...
$ git fetch origin ae59dabb7377f255ddab37aa5ffa6640f587e32a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-xtgo-set
 * [new ref]         ae59dabb7377f255ddab37aa5ffa6640f587e32a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ae59dab Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild