$ git clone -n https://src.fedoraproject.org/rpms/ghc-yesod-static.git /var/lib/mock/f39-build-2561105-62096/root/chroot_tmpdir/scmroot/ghc-yesod-static
Cloning into '/var/lib/mock/f39-build-2561105-62096/root/chroot_tmpdir/scmroot/ghc-yesod-static'...
$ git fetch origin ae47c5271aceb61d8cc89428fbbbdb3c12a6a48d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-yesod-static
 * [new ref]         ae47c5271aceb61d8cc89428fbbbdb3c12a6a48d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ae47c52 bump release