$ git clone -n https://src.fedoraproject.org/rpms/gpodder.git /var/lib/mock/f40-build-2218842-52622/root/chroot_tmpdir/scmroot/gpodder
Cloning into '/var/lib/mock/f40-build-2218842-52622/root/chroot_tmpdir/scmroot/gpodder'...
$ git fetch origin 7aac1e9e286da993e4439a11a2e3d305894b799a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gpodder
 * [new ref]         7aac1e9e286da993e4439a11a2e3d305894b799a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7aac1e9 Fix flatpak build