$ git clone -n https://src.fedoraproject.org/rpms/ghc-persistent-sqlite.git /var/lib/mock/f40-build-770212-125821/root/chroot_tmpdir/scmroot/ghc-persistent-sqlite
Cloning into '/var/lib/mock/f40-build-770212-125821/root/chroot_tmpdir/scmroot/ghc-persistent-sqlite'...
$ git fetch origin 3b831d61235489eff56b039bd1e5c619f0e70665:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-persistent-sqlite
 * [new ref]         3b831d61235489eff56b039bd1e5c619f0e70665 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3b831d6 bump release