$ git clone -n https://src.fedoraproject.org/rpms/ghc-yesod.git /var/lib/mock/f38-build-side-42-init-devel-1307260-30685/root/chroot_tmpdir/scmroot/ghc-yesod
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1307260-30685/root/chroot_tmpdir/scmroot/ghc-yesod'...
$ git fetch origin 70f2e1164c0e4def9f8d6323e6ca30557f89198b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-yesod
 * [new ref]         70f2e1164c0e4def9f8d6323e6ca30557f89198b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 70f2e11 Convert to %autorelease and %autochangelog