$ git clone -n https://src.fedoraproject.org/rpms/zlib-ada.git /var/lib/mock/f40-build-804655-144579/root/chroot_tmpdir/scmroot/zlib-ada
Cloning into '/var/lib/mock/f40-build-804655-144579/root/chroot_tmpdir/scmroot/zlib-ada'...
$ git fetch origin 784de00cca2d28c37fbeaf75c90d5cd3e04ad80c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/zlib-ada
 * [new ref]         784de00cca2d28c37fbeaf75c90d5cd3e04ad80c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 784de00 grammar