$ git clone -n https://src.fedoraproject.org/rpms/golang-github-mdlayher-packet.git /var/lib/mock/f45-build-12251-440/root/chroot_tmpdir/scmroot/golang-github-mdlayher-packet
Cloning into '/var/lib/mock/f45-build-12251-440/root/chroot_tmpdir/scmroot/golang-github-mdlayher-packet'...
$ git fetch origin 672b2da7deef968485876fe1b4762ed0d9069b11:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-mdlayher-packet
 * [new ref]         672b2da7deef968485876fe1b4762ed0d9069b11 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 672b2da Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild