$ git clone -n https://src.fedoraproject.org/rpms/pam-u2f.git /var/lib/mock/f40-build-2229188-53136/root/chroot_tmpdir/scmroot/pam-u2f
Cloning into '/var/lib/mock/f40-build-2229188-53136/root/chroot_tmpdir/scmroot/pam-u2f'...
$ git fetch origin eb6debdd6d336ac0b4769e383b82c066a9e7f828:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pam-u2f
 * [new ref]         eb6debdd6d336ac0b4769e383b82c066a9e7f828 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eb6debd Perform deglobing of files per packaging guidelines