$ git clone -n https://src.fedoraproject.org/rpms/koji-flatpak.git /var/lib/mock/f38-build-side-42-init-devel-1406801-31252/root/chroot_tmpdir/scmroot/koji-flatpak
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1406801-31252/root/chroot_tmpdir/scmroot/koji-flatpak'...
$ git fetch origin 16fc46b242a10e36c0063ddb60650cb986577bb5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/koji-flatpak
 * [new ref]         16fc46b242a10e36c0063ddb60650cb986577bb5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 16fc46b Version 0.6