$ git clone -n https://src.fedoraproject.org/rpms/ghc-primitive.git /var/lib/mock/f45-build-10645-419/root/chroot_tmpdir/scmroot/ghc-primitive
Cloning into '/var/lib/mock/f45-build-10645-419/root/chroot_tmpdir/scmroot/ghc-primitive'...
$ git fetch origin 90ff9049bb09629435e292a64d9f0dbc442bd6dd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-primitive
 * [new ref]         90ff9049bb09629435e292a64d9f0dbc442bd6dd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 90ff904 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild