$ git clone -n https://src.fedoraproject.org/rpms/gpaw-setups.git /var/lib/mock/f45-build-12920-444/root/chroot_tmpdir/scmroot/gpaw-setups
Cloning into '/var/lib/mock/f45-build-12920-444/root/chroot_tmpdir/scmroot/gpaw-setups'...
$ git fetch origin 53071ff099d4fdb3f8066e55a8e67daca8d6371d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gpaw-setups
 * [new ref]         53071ff099d4fdb3f8066e55a8e67daca8d6371d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 53071ff Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild