$ git clone -n https://src.fedoraproject.org/rpms/fedora-autofirstboot.git /var/lib/mock/f45-build-8842-396/root/chroot_tmpdir/scmroot/fedora-autofirstboot
Cloning into '/var/lib/mock/f45-build-8842-396/root/chroot_tmpdir/scmroot/fedora-autofirstboot'...
$ git fetch origin 1ff3513c92e1eab448058cca457c684a117e9dd3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fedora-autofirstboot
 * [new ref]         1ff3513c92e1eab448058cca457c684a117e9dd3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1ff3513 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild