$ git clone -n https://src.fedoraproject.org/rpms/ghc-these.git /var/lib/mock/f39-build-1935692-43119/root/chroot_tmpdir/scmroot/ghc-these
Cloning into '/var/lib/mock/f39-build-1935692-43119/root/chroot_tmpdir/scmroot/ghc-these'...
$ git fetch origin 33a0765e5b208637e40ac66952f94e7863d96dcf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-these
 * [new ref]         33a0765e5b208637e40ac66952f94e7863d96dcf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 33a0765 add foldable1-classes-compat