$ git clone -n https://src.fedoraproject.org/rpms/gpgme.git /var/lib/mock/f40-build-789055-135502/root/chroot_tmpdir/scmroot/gpgme
Cloning into '/var/lib/mock/f40-build-789055-135502/root/chroot_tmpdir/scmroot/gpgme'...
$ git fetch origin b17d8df23aa42f9255a99dd78ad5168be008ba30:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gpgme
 * [new ref]         b17d8df23aa42f9255a99dd78ad5168be008ba30 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b17d8df Merge #19 `update to 1.23.2`