$ git clone -n https://src.fedoraproject.org/rpms/ghc-http-api-data.git /var/lib/mock/f38-build-side-42-init-devel-813662-28316/root/chroot_tmpdir/scmroot/ghc-http-api-data
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-813662-28316/root/chroot_tmpdir/scmroot/ghc-http-api-data'...
$ git fetch origin af0adcc87d16bcd80820a4c16f4921ad32c33ec0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-http-api-data
 * [new ref]         af0adcc87d16bcd80820a4c16f4921ad32c33ec0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at af0adcc Convert to %autorelease and %autochangelog