$ git clone -n https://src.fedoraproject.org/rpms/ghc-wai-app-static.git /var/lib/mock/f38-build-723005-98969/root/chroot_tmpdir/scmroot/ghc-wai-app-static
Cloning into '/var/lib/mock/f38-build-723005-98969/root/chroot_tmpdir/scmroot/ghc-wai-app-static'...
$ git fetch origin 3e4ff1b872a9ff39663b67af36c49c067f66942b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-wai-app-static
 * [new ref]         3e4ff1b872a9ff39663b67af36c49c067f66942b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3e4ff1b Convert to %autorelease and %autochangelog