$ git clone -n https://src.fedoraproject.org/rpms/golang-github-spkg-bom.git /var/lib/mock/f45-build-12516-442/root/chroot_tmpdir/scmroot/golang-github-spkg-bom
Cloning into '/var/lib/mock/f45-build-12516-442/root/chroot_tmpdir/scmroot/golang-github-spkg-bom'...
$ git fetch origin 0171e19d8ddeecd2905a376e3d10d112cd39513d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-spkg-bom
 * [new ref]         0171e19d8ddeecd2905a376e3d10d112cd39513d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0171e19 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild