$ git clone -n https://src.fedoraproject.org/rpms/ghc-comonad.git /var/lib/mock/f38-build-side-42-init-devel-586450-26119/root/chroot_tmpdir/scmroot/ghc-comonad
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-586450-26119/root/chroot_tmpdir/scmroot/ghc-comonad'...
$ git fetch origin 8c72669fc12e62791dff6b03a5b888353c387e87:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-comonad
 * [new ref]         8c72669fc12e62791dff6b03a5b888353c387e87 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8c72669 Convert to %autorelease and %autochangelog