$ git clone -n https://src.fedoraproject.org/rpms/ghc-http-date.git /var/lib/mock/f45-build-10421-416/root/chroot_tmpdir/scmroot/ghc-http-date
Cloning into '/var/lib/mock/f45-build-10421-416/root/chroot_tmpdir/scmroot/ghc-http-date'...
$ git fetch origin ec49bd0adcfcd043f449083dff8e5aa1ef3787f4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-http-date
 * [new ref]         ec49bd0adcfcd043f449083dff8e5aa1ef3787f4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ec49bd0 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild