$ git clone -n https://src.fedoraproject.org/rpms/ghc-StateVar.git /var/lib/mock/f45-build-9940-411/root/chroot_tmpdir/scmroot/ghc-StateVar
Cloning into '/var/lib/mock/f45-build-9940-411/root/chroot_tmpdir/scmroot/ghc-StateVar'...
$ git fetch origin 117f5e9026993f5d0a2c59ec19c20f1d6f1bb70e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-StateVar
 * [new ref]         117f5e9026993f5d0a2c59ec19c20f1d6f1bb70e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 117f5e9 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild