$ git clone -n https://src.fedoraproject.org/rpms/pipenightdreams.git /var/lib/mock/f45-build-28528-631/root/chroot_tmpdir/scmroot/pipenightdreams
Cloning into '/var/lib/mock/f45-build-28528-631/root/chroot_tmpdir/scmroot/pipenightdreams'...
$ git fetch origin fb610df85746ea894c7adb08ab6d5d094248f3c7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pipenightdreams
 * [new ref]         fb610df85746ea894c7adb08ab6d5d094248f3c7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fb610df Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild